diff --git a/app/controllers/application_controller.rb b/app/controllers/application_controller.rb
index 310cbd25b..584751af9 100644
--- a/app/controllers/application_controller.rb
+++ b/app/controllers/application_controller.rb
@@ -364,4 +364,20 @@ class ApplicationController < ActionController::Base
   def set_customizable_view_path
     prepend_view_path "app/custom_views"
   end
+
+  # Extract a value from params based on the "path"
+  #
+  # params: { dossiers: { champs_attributes: { 1234 => { value: "hello" } } } }
+  #
+  # Usage: read_param_value("dossiers[champs_attributes][1234]", "value")
+  def read_param_value(path, name)
+    parts = path.split(/\[|\]\[|\]/) + [name]
+    parts.reduce(params) do |value, part|
+      if part.to_i != 0
+        value[part.to_i] || value[part]
+      else
+        value[part]
+      end
+    end
+  end
 end
diff --git a/app/controllers/champs/carte_controller.rb b/app/controllers/champs/carte_controller.rb
index 0d5f58024..0bc927f5a 100644
--- a/app/controllers/champs/carte_controller.rb
+++ b/app/controllers/champs/carte_controller.rb
@@ -2,7 +2,6 @@ class Champs::CarteController < ApplicationController
   before_action :authenticate_logged_user!
 
   def index
-    @selector = ".carte-#{params[:champ_id]}"
     @champ = policy_scope(Champ).find(params[:champ_id])
     @focus = params[:focus].present?
   end
diff --git a/app/controllers/champs/dossier_link_controller.rb b/app/controllers/champs/dossier_link_controller.rb
index 1ba3823e1..b41e26e6b 100644
--- a/app/controllers/champs/dossier_link_controller.rb
+++ b/app/controllers/champs/dossier_link_controller.rb
@@ -2,12 +2,7 @@ class Champs::DossierLinkController < ApplicationController
   before_action :authenticate_logged_user!
 
   def show
-    @position = params[:position]
-
-    if params[:dossier].key?(:champs_attributes)
-      @dossier_id = params[:dossier][:champs_attributes][params[:position]][:value]
-    else
-      @dossier_id = params[:dossier][:champs_private_attributes][params[:position]][:value]
-    end
+    @champ = policy_scope(Champ).find(params[:champ_id])
+    @linked_dossier_id = read_param_value(@champ.input_name, 'value')
   end
 end
diff --git a/app/controllers/champs/repetition_controller.rb b/app/controllers/champs/repetition_controller.rb
index 33b817836..8ed626fb2 100644
--- a/app/controllers/champs/repetition_controller.rb
+++ b/app/controllers/champs/repetition_controller.rb
@@ -3,13 +3,6 @@ class Champs::RepetitionController < ApplicationController
 
   def show
     @champ = policy_scope(Champ).includes(:champs).find(params[:champ_id])
-    @position = params[:position]
-    @champ.add_row
-
-    if @champ.private?
-      @attribute = "dossier[champs_private_attributes][#{@position}][champs_attributes]"
-    else
-      @attribute = "dossier[champs_attributes][#{@position}][champs_attributes]"
-    end
+    @champs = @champ.add_row
   end
 end
diff --git a/app/controllers/champs/siret_controller.rb b/app/controllers/champs/siret_controller.rb
index aaeaeac5b..1b1b33edd 100644
--- a/app/controllers/champs/siret_controller.rb
+++ b/app/controllers/champs/siret_controller.rb
@@ -2,9 +2,9 @@ class Champs::SiretController < ApplicationController
   before_action :authenticate_logged_user!
 
   def show
-    @position = params[:position]
-    extract_siret
-    find_etablisement
+    @champ = policy_scope(Champ).find(params[:champ_id])
+    @siret = read_param_value(@champ.input_name, 'value')
+    @etablissement = @champ.etablissement
 
     if @siret.empty?
       return clear_siret_and_etablissement
@@ -34,22 +34,6 @@ class Champs::SiretController < ApplicationController
 
   private
 
-  def extract_siret
-    if params[:dossier].key?(:champs_attributes)
-      @siret = params[:dossier][:champs_attributes][@position][:value]
-      @attribute = "dossier[champs_attributes][#{@position}][etablissement_attributes]"
-    else
-      @siret = params[:dossier][:champs_private_attributes][@position][:value]
-      @attribute = "dossier[champs_private_attributes][#{@position}][etablissement_attributes]"
-    end
-  end
-
-  def find_etablisement
-    @champ = policy_scope(Champ).find(params[:champ_id])
-    @etablissement = @champ.etablissement
-    @procedure_id = @champ.dossier.procedure.id
-  end
-
   def find_etablissement_with_siret
     APIEntrepriseService.create_etablissement(@champ, @siret, current_user.id)
   end
diff --git a/app/helpers/application_helper.rb b/app/helpers/application_helper.rb
index 6572b58bb..5a7a9872a 100644
--- a/app/helpers/application_helper.rb
+++ b/app/helpers/application_helper.rb
@@ -60,15 +60,6 @@ module ApplicationHelper
     end
   end
 
-  def render_champ(champ)
-    champ_selector = "##{champ.input_group_id}"
-    form_html = render 'shared/dossiers/edit', dossier: champ.dossier
-    champ_html = Nokogiri::HTML.fragment(form_html).at_css(champ_selector).to_s
-    # rubocop:disable Rails/OutputSafety
-    raw("document.querySelector('#{champ_selector}').outerHTML = \"#{escape_javascript(champ_html)}\";")
-    # rubocop:enable Rails/OutputSafety
-  end
-
   def remove_element(selector, timeout: 0, inner: false)
     script = "(function() {";
     script << "var el = document.querySelector('#{selector}');"
diff --git a/app/javascript/components/MapEditor/hooks.ts b/app/javascript/components/MapEditor/hooks.ts
index 9380a28fc..d292d5e1b 100644
--- a/app/javascript/components/MapEditor/hooks.ts
+++ b/app/javascript/components/MapEditor/hooks.ts
@@ -1,5 +1,5 @@
 import { useState, useCallback, useEffect } from 'react';
-import { getJSON, ajax, fire } from '@utils';
+import { httpRequest, fire } from '@utils';
 import type { Feature, FeatureCollection, Geometry } from 'geojson';
 
 export const SOURCE_SELECTION_UTILISATEUR = 'selection_utilisateur';
@@ -37,7 +37,9 @@ export function useFeatureCollection(
         type: 'FeatureCollection',
         features: callback(features)
       }));
-      ajax({ url, type: 'GET' }).catch(() => null);
+      httpRequest(url)
+        .js()
+        .catch(() => null);
     },
     [url, setFeatureCollection]
   );
@@ -99,7 +101,10 @@ export function useFeatureCollection(
       try {
         const newFeatures: Feature[] = [];
         for (const feature of features) {
-          const data = await getJSON(url, { feature, source }, 'post');
+          const data = await httpRequest(url, {
+            method: 'post',
+            json: { feature, source }
+          }).json<{ feature: Feature & { lid?: string | number } }>();
           if (data) {
             if (source == SOURCE_SELECTION_UTILISATEUR) {
               data.feature.lid = feature.id;
@@ -128,9 +133,15 @@ export function useFeatureCollection(
         for (const feature of features) {
           const id = feature.properties?.id;
           if (id) {
-            await getJSON(`${url}/${id}`, { feature }, 'patch');
+            await httpRequest(`${url}/${id}`, {
+              method: 'patch',
+              json: { feature }
+            }).json();
           } else {
-            const data = await getJSON(url, { feature, source }, 'post');
+            const data = await httpRequest(url, {
+              method: 'post',
+              json: { feature, source }
+            }).json<{ feature: Feature & { lid?: string | number } }>();
             if (data) {
               if (source == SOURCE_SELECTION_UTILISATEUR) {
                 data.feature.lid = feature.id;
@@ -157,7 +168,7 @@ export function useFeatureCollection(
         const deletedFeatures = [];
         for (const feature of features) {
           const id = feature.properties?.id;
-          await getJSON(`${url}/${id}`, null, 'delete');
+          await httpRequest(`${url}/${id}`, { method: 'delete' }).json();
           deletedFeatures.push(feature);
         }
         removeFeatures(deletedFeatures, external);
diff --git a/app/javascript/components/TypesDeChampEditor/OperationsQueue.ts b/app/javascript/components/TypesDeChampEditor/OperationsQueue.ts
index 0da09cebc..a6b1c4f40 100644
--- a/app/javascript/components/TypesDeChampEditor/OperationsQueue.ts
+++ b/app/javascript/components/TypesDeChampEditor/OperationsQueue.ts
@@ -1,4 +1,4 @@
-import { getJSON } from '@utils';
+import { httpRequest } from '@utils';
 import invariant from 'tiny-invariant';
 
 type Operation = {
@@ -45,7 +45,7 @@ export class OperationsQueue {
     const url = `${this.baseUrl}${path}`;
 
     try {
-      const data = await getJSON(url, payload, method);
+      const data = await httpRequest(url, { method, json: payload }).json();
       resolve(data);
     } catch (e) {
       handleError(e as OperationError, reject);
diff --git a/app/javascript/components/shared/queryClient.ts b/app/javascript/components/shared/queryClient.ts
index 8c7d8804b..ebf797c62 100644
--- a/app/javascript/components/shared/queryClient.ts
+++ b/app/javascript/components/shared/queryClient.ts
@@ -1,5 +1,5 @@
 import { QueryClient, QueryFunction } from 'react-query';
-import { getJSON, isNumeric } from '@utils';
+import { httpRequest, isNumeric } from '@utils';
 import { matchSorter } from 'match-sorter';
 
 type Gon = {
@@ -57,39 +57,27 @@ function buildURL(scope: string, term: string, extra?: string) {
   return `${api_geo_url}/${scope}?nom=${term}&limit=${API_GEO_QUERY_LIMIT}`;
 }
 
-function buildOptions(): [RequestInit, AbortController | null] {
-  if (window.AbortController) {
-    const controller = new AbortController();
-    const signal = controller.signal;
-    return [{ signal }, controller];
-  }
-  return [{}, null];
-}
-
 const defaultQueryFn: QueryFunction<unknown, QueryKey> = async ({
-  queryKey: [scope, term, extra]
+  queryKey: [scope, term, extra],
+  signal
 }) => {
   if (scope == 'pays') {
-    return matchSorter(await getPays(), term, { keys: ['label'] });
+    return matchSorter(await getPays(signal), term, { keys: ['label'] });
   }
 
   const url = buildURL(scope, term, extra);
-  const [options, controller] = buildOptions();
-  const promise = fetch(url, options).then((response) => {
-    if (response.ok) {
-      return response.json();
-    }
-    throw new Error(`Error fetching from "${scope}" API`);
-  });
-  return Object.assign(promise, {
-    cancel: () => controller && controller.abort()
-  });
+  return httpRequest(url, { csrf: false, signal }).json();
 };
 
 let paysCache: { label: string }[];
-async function getPays(): Promise<{ label: string }[]> {
+async function getPays(signal?: AbortSignal): Promise<{ label: string }[]> {
   if (!paysCache) {
-    paysCache = await getJSON('/api/pays', null);
+    const data = await httpRequest('/api/pays', { signal }).json<
+      typeof paysCache
+    >();
+    if (data) {
+      paysCache = data;
+    }
   }
   return paysCache;
 }
diff --git a/app/javascript/shared/polyfills.js b/app/javascript/shared/polyfills.js
index 229729779..3bc4a25a4 100644
--- a/app/javascript/shared/polyfills.js
+++ b/app/javascript/shared/polyfills.js
@@ -16,7 +16,27 @@ import 'yet-another-abortcontroller-polyfill';
 import './polyfills/insertAdjacentElement';
 import './polyfills/dataset';
 
-// IE 11 has no baseURI
+// IE 11 has no baseURI (required by turbo)
 if (document.baseURI == undefined) {
   document.baseURI = document.URL;
 }
+
+// IE 11 has no children on DocumentFragment (required by turbo)
+function polyfillChildren(proto) {
+  Object.defineProperty(proto, 'children', {
+    get: function () {
+      const children = [];
+      for (const node of this.childNodes) {
+        if (node.nodeType == 1) {
+          children.push(node);
+        }
+      }
+      return children;
+    }
+  });
+}
+
+const fragment = document.createDocumentFragment();
+if (fragment.children == undefined) {
+  polyfillChildren(DocumentFragment.prototype);
+}
diff --git a/app/javascript/shared/remote-poller.js b/app/javascript/shared/remote-poller.js
index f4faa6c02..77984c900 100644
--- a/app/javascript/shared/remote-poller.js
+++ b/app/javascript/shared/remote-poller.js
@@ -1,4 +1,4 @@
-import { ajax, delegate } from '@utils';
+import { httpRequest, delegate } from '@utils';
 
 addEventListener('DOMContentLoaded', () => {
   attachementPoller.deactivate();
@@ -69,7 +69,9 @@ class RemotePoller {
     for (let url of urls) {
       // Start the request. The JS payload in the response will update the page.
       // (Errors are ignored, because background tasks shouldn't report errors to the user.)
-      ajax({ url, type: 'get' }).catch(() => {});
+      httpRequest(url)
+        .js()
+        .catch(() => {});
     }
   }
 
diff --git a/app/javascript/shared/utils.ts b/app/javascript/shared/utils.ts
index 1c0c31ca4..609e2f27b 100644
--- a/app/javascript/shared/utils.ts
+++ b/app/javascript/shared/utils.ts
@@ -1,8 +1,9 @@
 import Rails from '@rails/ujs';
 import debounce from 'debounce';
+import { session } from '@hotwired/turbo';
 
 export { debounce };
-export const { fire, csrfToken } = Rails;
+export const { fire, csrfToken, cspNonce } = Rails;
 
 export function show(el: HTMLElement) {
   el && el.classList.remove('hidden');
@@ -93,7 +94,7 @@ export function ajax(options: Rails.AjaxOptions) {
   });
 }
 
-class ResponseError extends Error {
+export class ResponseError extends Error {
   response: Response;
 
   constructor(response: Response) {
@@ -102,18 +103,126 @@ class ResponseError extends Error {
   }
 }
 
-export function getJSON(url: string, data: unknown, method = 'GET') {
-  const { query, ...options } = fetchOptions(data, method);
+const FETCH_TIMEOUT = 30 * 1000; // 30 sec
 
-  return fetch(`${url}${query}`, options).then((response) => {
-    if (response.ok) {
-      if (response.status === 204) {
+// Perform an HTTP request using `fetch` API,
+// and handle the result depending on the MIME type.
+//
+// Usage:
+//
+// Execute a GET request, and return the response as parsed JSON
+// const parsedJson = await httpRequest(url).json();
+//
+// Execute a POST request with some JSON payload
+// const parsedJson = await httpRequest(url, { method: 'POST', json: '{ "foo": 1 }').json();
+//
+// Execute a GET request, and apply the Turbo stream in the Response
+// await httpRequest(url).turbo();
+//
+// Execute a GET request, and interpret the JavaScript code in the Response
+// DEPRECATED: Don't use this in new code; instead let the server respond with a turbo stream
+// await httpRequest(url).js();
+//
+export function httpRequest(
+  url: string,
+  {
+    csrf = true,
+    timeout = FETCH_TIMEOUT,
+    json,
+    controller,
+    ...init
+  }: RequestInit & {
+    csrf?: boolean;
+    json?: unknown;
+    timeout?: number | false;
+    controller?: AbortController;
+  } = {}
+) {
+  const headers = new Headers(init.headers);
+  if (csrf) {
+    headers.set('x-csrf-token', csrfToken() ?? '');
+    headers.set('x-requested-with', 'XMLHttpRequest');
+    init.credentials = 'same-origin';
+  }
+  init.headers = headers;
+  init.method = init.method?.toUpperCase() ?? 'GET';
+
+  if (json) {
+    headers.set('content-type', 'application/json');
+    init.body = JSON.stringify(json);
+  }
+
+  let timer: number;
+  if (!init.signal) {
+    controller = createAbortController(controller);
+    if (controller) {
+      init.signal = controller.signal;
+      if (timeout != false) {
+        timer = setTimeout(() => controller?.abort(), timeout);
+      }
+    }
+  }
+
+  const request = (init: RequestInit, accept?: string): Promise<Response> => {
+    if (accept && init.headers instanceof Headers) {
+      init.headers.set('accept', accept);
+    }
+    return fetch(url, init)
+      .then((response) => {
+        clearTimeout(timer);
+
+        if (response.ok) {
+          return response;
+        } else if (response.status == 401) {
+          location.reload(); // reload whole page so Devise will redirect to sign-in
+        }
+        throw new ResponseError(response);
+      })
+      .catch((error) => {
+        clearTimeout(timer);
+
+        throw error;
+      });
+  };
+
+  return {
+    async json<T>(): Promise<T | null> {
+      const response = await request(init, 'application/json');
+      if (response.status == 204) {
         return null;
       }
       return response.json();
+    },
+    async turbo(): Promise<void> {
+      const response = await request(init, 'text/vnd.turbo-stream.html');
+      if (response.status != 204) {
+        const stream = await response.text();
+        session.renderStreamMessage(stream);
+      }
+    },
+    async js(): Promise<void> {
+      const response = await request(init, 'text/javascript');
+      if (response.status != 204) {
+        const script = document.createElement('script');
+        const nonce = cspNonce();
+        if (nonce) {
+          script.setAttribute('nonce', nonce);
+        }
+        script.text = await response.text();
+        document.head.appendChild(script);
+        document.head.removeChild(script);
+      }
     }
-    throw new ResponseError(response);
-  });
+  };
+}
+
+function createAbortController(controller?: AbortController) {
+  if (controller) {
+    return controller;
+  } else if (window.AbortController) {
+    return new AbortController();
+  }
+  return;
 }
 
 export function scrollTo(container: HTMLElement, scrollTo: HTMLElement) {
@@ -162,53 +271,3 @@ export function timeoutable<T>(
   });
   return Promise.race([promise, timeoutPromise]);
 }
-
-const FETCH_TIMEOUT = 30 * 1000; // 30 sec
-
-function fetchOptions(data: unknown, method = 'GET') {
-  const options: RequestInit & {
-    query: string;
-    headers: Record<string, string>;
-  } = {
-    query: '',
-    method: method.toUpperCase(),
-    headers: {
-      accept: 'application/json',
-      'x-csrf-token': csrfToken() ?? '',
-      'x-requested-with': 'XMLHttpRequest'
-    },
-    credentials: 'same-origin'
-  };
-
-  if (data) {
-    if (options.method === 'GET') {
-      options.query = objectToQuerystring(data as Record<string, string>);
-    } else {
-      options.headers['content-type'] = 'application/json';
-      options.body = JSON.stringify(data);
-    }
-  }
-
-  if (window.AbortController) {
-    const controller = new AbortController();
-    options.signal = controller.signal;
-
-    setTimeout(() => {
-      controller.abort();
-    }, FETCH_TIMEOUT);
-  }
-
-  return options;
-}
-
-function objectToQuerystring(obj: Record<string, string>): string {
-  return Object.keys(obj).reduce(function (query, key, i) {
-    return [
-      query,
-      i === 0 ? '?' : '&',
-      encodeURIComponent(key),
-      '=',
-      encodeURIComponent(obj[key])
-    ].join('');
-  }, '');
-}
diff --git a/app/jobs/cron/purge_unused_admin_job.rb b/app/jobs/cron/purge_unused_admin_job.rb
new file mode 100644
index 000000000..d58f479d4
--- /dev/null
+++ b/app/jobs/cron/purge_unused_admin_job.rb
@@ -0,0 +1,7 @@
+class Cron::PurgeUnusedAdminJob < Cron::CronJob
+  self.schedule_expression = "every monday at 5 am"
+
+  def perform(*args)
+    Administrateur.unused.destroy_all
+  end
+end
diff --git a/app/models/administrateur.rb b/app/models/administrateur.rb
index a35e77098..d6bbbe258 100644
--- a/app/models/administrateur.rb
+++ b/app/models/administrateur.rb
@@ -12,6 +12,8 @@
 class Administrateur < ApplicationRecord
   include ActiveRecord::SecureToken
 
+  UNUSED_ADMIN_THRESHOLD = 6.months
+
   has_and_belongs_to_many :instructeurs
   has_and_belongs_to_many :procedures
   has_many :services
@@ -23,6 +25,14 @@ class Administrateur < ApplicationRecord
   scope :inactive, -> { joins(:user).where(users: { last_sign_in_at: nil }) }
   scope :with_publiees_ou_closes, -> { joins(:procedures).where(procedures: { aasm_state: [:publiee, :close, :depubliee] }) }
 
+  scope :unused, -> do
+    joins(:user)
+      .where.missing(:services)
+      .left_outer_joins(:administrateurs_procedures) # needed to bypass procedure hidden default scope
+      .where(administrateurs_procedures: { procedure_id: nil })
+      .where("users.last_sign_in_at < ? ", UNUSED_ADMIN_THRESHOLD.ago)
+  end
+
   def self.by_email(email)
     Administrateur.find_by(users: { email: email })
   end
diff --git a/app/models/champ.rb b/app/models/champ.rb
index a4ead1f60..da1919a83 100644
--- a/app/models/champ.rb
+++ b/app/models/champ.rb
@@ -137,6 +137,23 @@ class Champ < ApplicationRecord
     "#{html_id}-input"
   end
 
+  # A predictable string to use when generating an input name for this champ.
+  #
+  # Rail's FormBuilder can auto-generate input names, using the form "dossier[champs_attributes][5]",
+  # where [5] is the index of the field in the form.
+  # However the field index makes it difficult to render a single field, independent from the ordering of the others.
+  #
+  # Luckily, this is only used to make the name unique, but the actual value is ignored when Rails parses nested
+  # attributes. So instead of the field index, this method uses the champ id; which gives us an independent and
+  # predictable input name.
+  def input_name
+    if parent_id
+      "#{parent.input_name}[#{champs_attributes_accessor}][#{id}]"
+    else
+      "dossier[#{champs_attributes_accessor}][#{id}]"
+    end
+  end
+
   def labelledby_id
     "#{html_id}-label"
   end
@@ -169,6 +186,14 @@ class Champ < ApplicationRecord
     "#{stable_id}-#{id}"
   end
 
+  def champs_attributes_accessor
+    if private?
+      "champs_private_attributes"
+    else
+      "champs_attributes"
+    end
+  end
+
   def needs_dossier_id?
     !dossier_id && parent_id
   end
diff --git a/app/models/champs/repetition_champ.rb b/app/models/champs/repetition_champ.rb
index 25ed1700d..929d8f004 100644
--- a/app/models/champs/repetition_champ.rb
+++ b/app/models/champs/repetition_champ.rb
@@ -28,12 +28,15 @@ class Champs::RepetitionChamp < Champ
   end
 
   def add_row
+    added_champs = []
     transaction do
       row = (blank? ? -1 : champs.last.row) + 1
       type_de_champ.types_de_champ.each do |type_de_champ|
-        self.champs << type_de_champ.champ.build(row: row)
+        added_champs << type_de_champ.champ.build(row: row)
       end
+      self.champs << added_champs
     end
+    added_champs
   end
 
   def blank?
diff --git a/app/views/champs/carte/index.js.erb b/app/views/champs/carte/index.js.erb
index 37ef6c3a7..1cd381cd7 100644
--- a/app/views/champs/carte/index.js.erb
+++ b/app/views/champs/carte/index.js.erb
@@ -1,6 +1,6 @@
 <%= render_flash(timeout: 5000, fixed: true) %>
 
-<%= render_to_element("#{@selector} + .geo-areas",
+<%= render_to_element("##{@champ.input_group_id} .geo-areas",
   partial: 'shared/champs/carte/geo_areas',
   locals: { champ: @champ, editing: true }) %>
 
diff --git a/app/views/champs/dossier_link/show.js.erb b/app/views/champs/dossier_link/show.js.erb
index dece3758a..cdf84195a 100644
--- a/app/views/champs/dossier_link/show.js.erb
+++ b/app/views/champs/dossier_link/show.js.erb
@@ -1,3 +1,3 @@
-<%= render_to_element(".dossier-link-#{@position} .help-block",
+<%= render_to_element("##{@champ.input_group_id} .help-block",
   partial: 'shared/champs/dossier_link/help_block',
-  locals: { id: @dossier_id }) %>
+  locals: { id: @linked_dossier_id }) %>
diff --git a/app/views/champs/piece_justificative/show.js.erb b/app/views/champs/piece_justificative/show.js.erb
index c8bbaf377..ea8cb9ecb 100644
--- a/app/views/champs/piece_justificative/show.js.erb
+++ b/app/views/champs/piece_justificative/show.js.erb
@@ -1,4 +1,6 @@
-<%= render_champ(@champ) %>
+<%= fields_for @champ.input_name, @champ do |form| %>
+  <%= render_to_element("##{@champ.input_group_id}", partial: "shared/dossiers/editable_champs/editable_champ", locals: { champ: @champ, form: form }, outer: true) %>
+<% end %>
 
 <% attachment = @champ.piece_justificative_file.attachment %>
 <% if attachment.virus_scanner.pending? %>
diff --git a/app/views/champs/repetition/_show.html.haml b/app/views/champs/repetition/_show.html.haml
deleted file mode 100644
index 98ba3f239..000000000
--- a/app/views/champs/repetition/_show.html.haml
+++ /dev/null
@@ -1,16 +0,0 @@
-- champs = champ.rows.last
-- if champs.present?
-  - index = (champ.rows.size - 1) * champs.size
-  - row_dom_id = "row-#{SecureRandom.hex(4)}"
-  %div{ class: "row row-#{champs.first.row}", id: row_dom_id }
-    -# Tell the controller which DOM element should be removed once the row deletion is successful
-    = hidden_field_tag 'deleted_row_dom_ids[]', row_dom_id, disabled: true
-
-    - champs.each.with_index(index) do |champ, index|
-      = fields_for "#{attribute}[#{index}]", champ do |form|
-        = render partial: "shared/dossiers/editable_champs/editable_champ", locals: { champ: champ, form: form }
-        = form.hidden_field :id
-        = form.hidden_field :_destroy, disabled: true
-    .flex.row-reverse
-      %button.button.danger.remove-row
-        Supprimer l’élément
diff --git a/app/views/champs/repetition/show.js.erb b/app/views/champs/repetition/show.js.erb
index af552c482..1ac03b11c 100644
--- a/app/views/champs/repetition/show.js.erb
+++ b/app/views/champs/repetition/show.js.erb
@@ -1,3 +1,3 @@
-<%= append_to_element(".repetition-#{@position}",
-  partial: 'champs/repetition/show',
-  locals: { champ: @champ, attribute: @attribute }) %>
+<%= fields_for @champ.input_name, @champ do |form| %>
+  <%= append_to_element("##{@champ.input_group_id} .repetition", partial: 'shared/dossiers/editable_champs/repetition_row', locals: { form: form, champ: @champ, row: @champs }) %>
+<% end %>
diff --git a/app/views/champs/siret/show.js.erb b/app/views/champs/siret/show.js.erb
index f0ab71e4f..85d3c51c9 100644
--- a/app/views/champs/siret/show.js.erb
+++ b/app/views/champs/siret/show.js.erb
@@ -1,6 +1,3 @@
-<%= render_to_element(".siret-info-#{@position}",
+<%= render_to_element("##{@champ.input_group_id} .siret-info",
   partial: 'shared/champs/siret/etablissement',
-  locals: {
-    siret: @siret,
-    attribute: @attribute,
-    etablissement: @etablissement }) %>
+  locals: { siret: @siret, etablissement: @etablissement }) %>
diff --git a/app/views/instructeurs/dossiers/annotations_privees.html.haml b/app/views/instructeurs/dossiers/annotations_privees.html.haml
index 4d3181b7e..bfa9e05a7 100644
--- a/app/views/instructeurs/dossiers/annotations_privees.html.haml
+++ b/app/views/instructeurs/dossiers/annotations_privees.html.haml
@@ -6,10 +6,9 @@
   - if @dossier.champs_private.present?
     %section
       = form_for @dossier, url: annotations_instructeur_dossier_path(@dossier.procedure, @dossier), html: { class: 'form' } do |f|
-        = f.fields_for :champs_private, f.object.champs_private do |champ_form|
-          - champ = champ_form.object
-          = render partial: "shared/dossiers/editable_champs/editable_champ",
-            locals: { champ: champ, form: champ_form, seen_at: @annotations_privees_seen_at }
+        - @dossier.champs_private.each do |champ|
+          = fields_for champ.input_name, champ do |form|
+            = render partial: "shared/dossiers/editable_champs/editable_champ", locals: { form: form, champ: champ, seen_at: @annotations_privees_seen_at }
 
         .send-wrapper
           = f.submit 'Sauvegarder', class: 'button primary send', data: { disable: true }
diff --git a/app/views/manager/application/_navigation.html.erb b/app/views/manager/application/_navigation.html.erb
index b7879e718..a82853123 100644
--- a/app/views/manager/application/_navigation.html.erb
+++ b/app/views/manager/application/_navigation.html.erb
@@ -25,7 +25,7 @@ as defined by the routes in the `admin/` namespace
 
   <%= link_to "Delayed Jobs", manager_delayed_job_path, class: "navigation__link" %>
   <%= link_to "Features", manager_flipper_path, class: "navigation__link" %>
-  <% if ENV["SENDINBLUE_ENABLED"] == "enabled" && ENV["SAML_IDP_ENABLED"] == "enabled" %>
+  <% if Rails.application.secrets.sendinblue[:enabled] && ENV["SAML_IDP_ENABLED"] == "enabled" %>
     <%= link_to "Sendinblue", ENV.fetch("SENDINBLUE_LOGIN_URL"), class: "navigation__link", target: '_blank' %>
   <% end %>
 </nav>
diff --git a/app/views/shared/dossiers/_edit.html.haml b/app/views/shared/dossiers/_edit.html.haml
index 23a7b1362..cbf21eb76 100644
--- a/app/views/shared/dossiers/_edit.html.haml
+++ b/app/views/shared/dossiers/_edit.html.haml
@@ -35,10 +35,9 @@
         dossier.procedure.groupe_instructeurs.order(:label).map { |gi| [gi.label, gi.id] },
         { include_blank: dossier.brouillon? }
 
-    = f.fields_for :champs, dossier.champs do |champ_form|
-      - champ = champ_form.object
-      = render partial: "shared/dossiers/editable_champs/editable_champ",
-        locals: { champ: champ, form: champ_form }
+    - dossier.champs.each do |champ|
+      = fields_for champ.input_name, champ do |form|
+        = render partial: "shared/dossiers/editable_champs/editable_champ", locals: { form: form, champ: champ }
 
     - if !dossier.for_procedure_preview?
       .dossier-edit-sticky-footer
diff --git a/app/views/shared/dossiers/editable_champs/_carte.html.haml b/app/views/shared/dossiers/editable_champs/_carte.html.haml
index 6e7db1be6..41fa07ac7 100644
--- a/app/views/shared/dossiers/editable_champs/_carte.html.haml
+++ b/app/views/shared/dossiers/editable_champs/_carte.html.haml
@@ -1,4 +1,4 @@
-= react_component("MapEditor", { featureCollection: champ.to_feature_collection, url: champs_carte_features_path(champ), options: champ.render_options }, class: "carte-#{champ.id}")
+= react_component("MapEditor", featureCollection: champ.to_feature_collection, url: champs_carte_features_path(champ), options: champ.render_options)
 
 .geo-areas
   = render partial: 'shared/champs/carte/geo_areas', locals: { champ: champ, editing: true }
diff --git a/app/views/shared/dossiers/editable_champs/_dossier_link.html.haml b/app/views/shared/dossiers/editable_champs/_dossier_link.html.haml
index 2ac650300..f3a72c1ed 100644
--- a/app/views/shared/dossiers/editable_champs/_dossier_link.html.haml
+++ b/app/views/shared/dossiers/editable_champs/_dossier_link.html.haml
@@ -1,11 +1,11 @@
-.dossier-link{ class: "dossier-link-#{form.index}" }
+.dossier-link
   = form.number_field :value,
     id: champ.input_id,
     aria: { describedby: champ.describedby_id },
     placeholder: "Numéro de dossier",
     autocomplete: 'off',
     required: champ.mandatory?,
-    data: { remote: true, url: champs_dossier_link_path(form.index) }
+    data: { remote: true, url: champs_dossier_link_path(champ.id) }
 
   .help-block
     = render partial: 'shared/champs/dossier_link/help_block', locals: { id: champ.value }
diff --git a/app/views/shared/dossiers/editable_champs/_drop_down_list.html.haml b/app/views/shared/dossiers/editable_champs/_drop_down_list.html.haml
index d374cd0cb..18b47c2df 100644
--- a/app/views/shared/dossiers/editable_champs/_drop_down_list.html.haml
+++ b/app/views/shared/dossiers/editable_champs/_drop_down_list.html.haml
@@ -19,4 +19,4 @@
     = form.select :value, champ.options, { selected: champ.selected}, required: champ.mandatory?, id: champ.input_id, aria: { describedby: champ.describedby_id }
 
   - if champ.drop_down_other?
-    = render partial: "shared/dossiers/drop_down_other_input", locals: { form: form, champ: champ }
+    = render partial: "shared/dossiers/editable_champs/drop_down_other_input", locals: { form: form, champ: champ }
diff --git a/app/views/shared/dossiers/_drop_down_other_input.html.haml b/app/views/shared/dossiers/editable_champs/_drop_down_other_input.html.haml
similarity index 100%
rename from app/views/shared/dossiers/_drop_down_other_input.html.haml
rename to app/views/shared/dossiers/editable_champs/_drop_down_other_input.html.haml
diff --git a/app/views/shared/dossiers/editable_champs/_editable_champ.html.haml b/app/views/shared/dossiers/editable_champs/_editable_champ.html.haml
index c449fd4ba..3ce3a193b 100644
--- a/app/views/shared/dossiers/editable_champs/_editable_champ.html.haml
+++ b/app/views/shared/dossiers/editable_champs/_editable_champ.html.haml
@@ -8,5 +8,6 @@
     = render partial: 'shared/dossiers/editable_champs/champ_label', locals: { form: form, champ: champ, seen_at: defined?(seen_at) ? seen_at : nil }
   - if champ.type_champ == "titre_identite"
     %p.notice  Carte nationale d’identité (uniquement le recto), passeport, titre de séjour ou autre justificatif d’identité. Formats acceptés : jpg/png
-  = render partial: "shared/dossiers/editable_champs/#{champ.type_champ}",
-    locals: { champ: champ, form: form }
+
+  = form.hidden_field :id, value: champ.id
+  = render partial: "shared/dossiers/editable_champs/#{champ.type_champ}", locals: { form: form, champ: champ }
diff --git a/app/views/shared/dossiers/editable_champs/_repetition.html.haml b/app/views/shared/dossiers/editable_champs/_repetition.html.haml
index 2f694ce63..010289cb0 100644
--- a/app/views/shared/dossiers/editable_champs/_repetition.html.haml
+++ b/app/views/shared/dossiers/editable_champs/_repetition.html.haml
@@ -1,24 +1,9 @@
-%div{ class: "repetition-#{form.index}" }
+.repetition
   - champ.rows.each do |champs|
-    - row_dom_id = "row-#{SecureRandom.hex(4)}"
-    %div{ class: "row row-#{champs.first.row}", id: row_dom_id }
-      -# Tell the controller which DOM element should be removed once the row deletion is successful
-      = hidden_field_tag 'deleted_row_dom_ids[]', row_dom_id, disabled: true
-
-      - champs.each do |champ|
-        = form.fields_for :champs, champ do |form|
-          = render partial: 'shared/dossiers/editable_champs/editable_champ', locals: { champ: form.object, form: form }
-          = form.hidden_field :_destroy, disabled: true
-      .flex.row-reverse
-        - if champ.persisted?
-          %button.button.danger.remove-row{ type: :button }
-            Supprimer l’élément
-        - else
-          %button.button.danger{ type: :button }
-            Supprimer l’élément
+    = render partial: 'shared/dossiers/editable_champs/repetition_row', locals: { form: form, champ: champ, row: champs }
 
 - if champ.persisted?
-  = link_to champs_repetition_path(form.index), class: 'button add-row', data: { remote: true, disable: true, method: 'POST', params: { champ_id: champ&.id }.to_query } do
+  = link_to champs_repetition_path(champ.id), class: 'button add-row', data: { remote: true, disable: true, method: 'POST' } do
     %span.icon.add
     Ajouter un élément pour « #{champ.libelle} »
 - else
diff --git a/app/views/shared/dossiers/editable_champs/_repetition_row.html.haml b/app/views/shared/dossiers/editable_champs/_repetition_row.html.haml
new file mode 100644
index 000000000..d416a3665
--- /dev/null
+++ b/app/views/shared/dossiers/editable_champs/_repetition_row.html.haml
@@ -0,0 +1,13 @@
+- row_dom_id = "row-#{SecureRandom.hex(4)}"
+.row{ id: row_dom_id }
+  -# Tell the controller which DOM element should be removed once the row deletion is successful
+  = hidden_field_tag 'deleted_row_dom_ids[]', row_dom_id, disabled: true
+
+  - row.each do |champ|
+    = fields_for champ.input_name, champ do |form|
+      = render partial: 'shared/dossiers/editable_champs/editable_champ', locals: { form: form, champ: champ }
+      = form.hidden_field :_destroy, disabled: true
+
+  .flex.row-reverse
+    %button.button.danger.remove-row{ type: :button }
+      Supprimer l’élément
diff --git a/app/views/shared/dossiers/editable_champs/_siret.html.haml b/app/views/shared/dossiers/editable_champs/_siret.html.haml
index 2fdcb3e9c..402a20428 100644
--- a/app/views/shared/dossiers/editable_champs/_siret.html.haml
+++ b/app/views/shared/dossiers/editable_champs/_siret.html.haml
@@ -2,11 +2,11 @@
   id: champ.input_id,
   aria: { describedby: champ.describedby_id },
   placeholder: champ.libelle,
-  data: { remote: true, debounce: true, url: champs_siret_path(form.index), params: { champ_id: champ&.id }.to_query, spinner: true },
+  data: { remote: true, debounce: true, url: champs_siret_path(champ.id), spinner: true },
   required: champ.mandatory?,
   pattern: "[0-9]{14}",
   title: "Le numéro de SIRET doit comporter exactement 14 chiffres"
 .spinner.right.hidden
-.siret-info{ class: "siret-info-#{form.index}" }
+.siret-info
   - if champ.etablissement.present?
     = render partial: 'shared/dossiers/editable_champs/etablissement_titre', locals: { etablissement: champ.etablissement }
diff --git a/config/env.example b/config/env.example
index 56276ac9a..b3090af82 100644
--- a/config/env.example
+++ b/config/env.example
@@ -84,19 +84,12 @@ MATOMO_HOST="matomo.example.org"
 MAILJET_API_KEY=""
 MAILJET_SECRET_KEY=""
 
-# Alternate SMTP Provider: SendInBlue
-SENDINBLUE_ENABLED="disabled"
+# Alternate SMTP Provider: SendInBlue/DoList
 SENDINBLUE_CLIENT_KEY=""
 SENDINBLUE_SMTP_KEY=""
 SENDINBLUE_USER_NAME=""
 # SENDINBLUE_LOGIN_URL="https://app.sendinblue.com/account/saml/login/truc"
 
-# Ratio of emails sent using SendInBlue
-# When enabled, N % of emails will be sent using SendInBlue
-# (and the others using the default SMTP provider)
-SENDINBLUE_BALANCING="disabled"
-SENDINBLUE_BALANCING_VALUE="50"
-
 # Alternate SMTP Provider: Mailtrap (mail catcher for staging environments)
 # When enabled, all emails will be sent using this provider
 MAILTRAP_ENABLED="disabled"
diff --git a/config/env.example.optional b/config/env.example.optional
index 08e47f706..e19e0d6b5 100644
--- a/config/env.example.optional
+++ b/config/env.example.optional
@@ -119,3 +119,12 @@ MATOMO_IFRAME_URL="https://matomo.example.org/index.php?module=CoreAdminHome&act
 # DOLIST_ACCOUNT_ID=""
 # DOLIST_NO_REPLY_EMAIL=""
 # DOLIST_API_KEY=""
+
+# Ratio of emails sent using SendInBlue
+# When present, N % of emails will be sent using SendInBlue
+# (and the others using the default SMTP provider)
+SENDINBLUE_BALANCING_VALUE="50"
+# Ratio of emails sent using DoList
+# When present, N % of emails will be sent using DoList
+# (and the others using the default SMTP provider)
+DOLIST_BALANCING_VALUE="50"
diff --git a/config/environments/production.rb b/config/environments/production.rb
index 91b050442..bf8f75a4d 100644
--- a/config/environments/production.rb
+++ b/config/environments/production.rb
@@ -81,24 +81,8 @@ Rails.application.configure do
   elsif ENV['MAILCATCHER_ENABLED'] == 'enabled'
     config.action_mailer.delivery_method = :mailcatcher
   else
-
-    sendinblue_weigth = case [ENV['SENDINBLUE_ENABLED'] == 'enabled', ENV['SENDINBLUE_BALANCING'] == 'enabled']
-      in [false, _]
-        0
-      in [true, false]
-        100
-      else
-        ENV.fetch('SENDINBLUE_BALANCING_VALUE').to_i
-      end
-
-    dolist_weigth = case [ENV['DOLIST_ENABLED'] == 'enabled', ENV['DOLIST_BALANCING'] == 'enabled']
-      in [false, _]
-        0
-      in [true, false]
-        100
-      else
-        ENV.fetch('DOLIST_BALANCING_VALUE').to_i
-      end
+    sendinblue_weigth = ENV.fetch('SENDINBLUE_BALANCING_VALUE') { 0 }.to_i
+    dolist_weigth = ENV.fetch('DOLIST_BALANCING_VALUE') { 0 }.to_i
 
     ActionMailer::Base.add_delivery_method :balancer, BalancerDeliveryMethod
     config.action_mailer.balancer_settings = {
diff --git a/config/initializers/sendinblue.rb b/config/initializers/sendinblue.rb
index 206b3905d..379f0b203 100644
--- a/config/initializers/sendinblue.rb
+++ b/config/initializers/sendinblue.rb
@@ -1,4 +1,4 @@
-if ENV.fetch('SENDINBLUE_ENABLED') == 'enabled'
+if ENV.key?('SENDINBLUE_BALANCING_VALUE')
   require 'sib-api-v3-sdk'
 
   ActiveSupport.on_load(:action_mailer) do
diff --git a/config/routes.rb b/config/routes.rb
index 655a3247e..34400251f 100644
--- a/config/routes.rb
+++ b/config/routes.rb
@@ -141,18 +141,17 @@ Rails.application.routes.draw do
   end
 
   namespace :champs do
-    get ':position/siret', to: 'siret#show', as: :siret
-    get ':position/dossier_link', to: 'dossier_link#show', as: :dossier_link
-    post ':position/carte', to: 'carte#show', as: :carte
+    get ':champ_id/siret', to: 'siret#show', as: :siret
+    get ':champ_id/dossier_link', to: 'dossier_link#show', as: :dossier_link
+    post ':champ_id/carte', to: 'carte#show', as: :carte
+    post ':champ_id/repetition', to: 'repetition#show', as: :repetition
 
     get ':champ_id/carte/features', to: 'carte#index', as: :carte_features
     post ':champ_id/carte/features', to: 'carte#create'
-    post ':champ_id/carte/features/import', to: 'carte#import'
     patch ':champ_id/carte/features/:id', to: 'carte#update'
     delete ':champ_id/carte/features/:id', to: 'carte#destroy'
 
-    post ':position/repetition', to: 'repetition#show', as: :repetition
-    put 'piece_justificative/:champ_id', to: 'piece_justificative#update', as: :piece_justificative
+    put ':champ_id/piece_justificative', to: 'piece_justificative#update', as: :piece_justificative
   end
 
   resources :attachments, only: [:show, :destroy]
diff --git a/config/secrets.yml b/config/secrets.yml
index 213c41d98..35a8a5c42 100644
--- a/config/secrets.yml
+++ b/config/secrets.yml
@@ -53,7 +53,7 @@ defaults: &defaults
     client_secret: <%= ENV['HELPSCOUT_CLIENT_SECRET'] %>
     webhook_secret: <%= ENV['HELPSCOUT_WEBHOOK_SECRET'] %>
   sendinblue:
-    enabled: <%= ENV['SENDINBLUE_ENABLED'] == 'enabled' %>
+    enabled: <%= ENV.key?('SENDINBLUE_BALANCING_VALUE') %>
     username: <%= ENV['SENDINBLUE_USER_NAME'] %>
     client_key: <%= ENV['SENDINBLUE_CLIENT_KEY'] %>
     smtp_key: <%= ENV['SENDINBLUE_SMTP_KEY'] %>
diff --git a/patches/@hotwired+turbo+7.1.0.patch b/patches/@hotwired+turbo+7.1.0.patch
deleted file mode 100644
index 8b41c74a0..000000000
--- a/patches/@hotwired+turbo+7.1.0.patch
+++ /dev/null
@@ -1,28 +0,0 @@
-diff --git a/node_modules/@hotwired/turbo/dist/turbo.es2017-esm.js b/node_modules/@hotwired/turbo/dist/turbo.es2017-esm.js
-index 963422f..7820263 100644
---- a/node_modules/@hotwired/turbo/dist/turbo.es2017-esm.js
-+++ b/node_modules/@hotwired/turbo/dist/turbo.es2017-esm.js
-@@ -551,7 +551,8 @@ class StreamMessage {
-         }, []);
-     }
-     get templateChildren() {
--        return Array.from(this.templateElement.content.children);
-+        const content = this.templateElement.content;
-+        return content.children ? Array.from(content.children) : Array.from(content.childNodes).filter((tag) => tag.tagName);
-     }
- }
- StreamMessage.contentType = "text/vnd.turbo-stream.html";
-diff --git a/node_modules/@hotwired/turbo/dist/turbo.es2017-umd.js b/node_modules/@hotwired/turbo/dist/turbo.es2017-umd.js
-index 101db1f..a63cfbe 100644
---- a/node_modules/@hotwired/turbo/dist/turbo.es2017-umd.js
-+++ b/node_modules/@hotwired/turbo/dist/turbo.es2017-umd.js
-@@ -557,7 +557,8 @@ Copyright © 2021 Basecamp, LLC
-             }, []);
-         }
-         get templateChildren() {
--            return Array.from(this.templateElement.content.children);
-+            const content = this.templateElement.content;
-+            return content.children ? Array.from(content.children) : Array.from(content.childNodes).filter((tag) => tag.tagName);
-         }
-     }
-     StreamMessage.contentType = "text/vnd.turbo-stream.html";
diff --git a/spec/controllers/champs/dossier_link_controller_spec.rb b/spec/controllers/champs/dossier_link_controller_spec.rb
index e76610703..319fad897 100644
--- a/spec/controllers/champs/dossier_link_controller_spec.rb
+++ b/spec/controllers/champs/dossier_link_controller_spec.rb
@@ -1,22 +1,26 @@
 describe Champs::DossierLinkController, type: :controller do
   let(:user) { create(:user) }
-  let(:procedure) { create(:procedure, :published) }
+  let(:procedure) { create(:procedure, :published, :with_dossier_link) }
 
   describe '#show' do
     let(:dossier) { create(:dossier, user: user, procedure: procedure) }
+    let(:champ) { dossier.champs.first }
 
     context 'when user is connected' do
       render_views
       before { sign_in user }
 
+      let(:champs_attributes) do
+        champ_attributes = []
+        champ_attributes[champ.id] = { value: dossier_id }
+        champ_attributes
+      end
       let(:params) do
         {
+          champ_id: champ.id,
           dossier: {
-            champs_attributes: {
-              '1' => { value: dossier_id.to_s }
-            }
-          },
-          position: '1'
+            champs_attributes: champs_attributes
+          }
         }
       end
       let(:dossier_id) { dossier.id }
@@ -30,7 +34,7 @@ describe Champs::DossierLinkController, type: :controller do
           expect(response.body).to include('Dossier en brouillon')
           expect(response.body).to include(procedure.libelle)
           expect(response.body).to include(procedure.organisation)
-          expect(response.body).to include('.dossier-link-1 .help-block')
+          expect(response.body).to include("##{champ.input_group_id} .help-block")
         end
       end
 
@@ -42,14 +46,14 @@ describe Champs::DossierLinkController, type: :controller do
 
         it 'renders error message' do
           expect(response.body).to include('Ce dossier est inconnu')
-          expect(response.body).to include('.dossier-link-1 .help-block')
+          expect(response.body).to include("##{champ.input_group_id} .help-block")
         end
       end
     end
 
     context 'when user is not connected' do
       before do
-        get :show, params: { position: '1' }, format: :js, xhr: true
+        get :show, params: { champ_id: champ.id }, format: :js, xhr: true
       end
 
       it { expect(response.code).to eq('401') }
diff --git a/spec/controllers/champs/siret_controller_spec.rb b/spec/controllers/champs/siret_controller_spec.rb
index f23d6b1c8..820d4703d 100644
--- a/spec/controllers/champs/siret_controller_spec.rb
+++ b/spec/controllers/champs/siret_controller_spec.rb
@@ -1,23 +1,22 @@
 describe Champs::SiretController, type: :controller do
   let(:user) { create(:user) }
-  let(:procedure) do
-    tdc_siret = build(:type_de_champ_siret, procedure: nil)
-    create(:procedure, :published, types_de_champ: [tdc_siret])
-  end
+  let(:procedure) { create(:procedure, :published, :with_siret) }
 
   describe '#show' do
     let(:dossier) { create(:dossier, user: user, procedure: procedure) }
     let(:champ) { dossier.champs.first }
 
+    let(:champs_attributes) do
+      champ_attributes = []
+      champ_attributes[champ.id] = { value: siret }
+      champ_attributes
+    end
     let(:params) do
       {
         champ_id: champ.id,
         dossier: {
-          champs_attributes: {
-            '1' => { value: siret.to_s }
-          }
-        },
-        position: '1'
+          champs_attributes: champs_attributes
+        }
       }
     end
     let(:siret) { '' }
@@ -47,7 +46,7 @@ describe Champs::SiretController, type: :controller do
         end
 
         it 'clears any information or error message' do
-          expect(response.body).to include('.siret-info-1')
+          expect(response.body).to include("##{champ.input_group_id} .siret-info")
           expect(response.body).to include('innerHTML = ""')
         end
       end
@@ -120,7 +119,7 @@ describe Champs::SiretController, type: :controller do
     end
 
     context 'when user is not signed in' do
-      subject! { get :show, params: { position: '1' }, format: :js, xhr: true }
+      subject! { get :show, params: { champ_id: champ.id }, format: :js, xhr: true }
 
       it { expect(response.code).to eq('401') }
     end
diff --git a/spec/factories/procedure.rb b/spec/factories/procedure.rb
index 8f7268493..ae3aed1e0 100644
--- a/spec/factories/procedure.rb
+++ b/spec/factories/procedure.rb
@@ -154,6 +154,12 @@ FactoryBot.define do
       end
     end
 
+    trait :with_siret do
+      after(:build) do |procedure, _evaluator|
+        build(:type_de_champ_siret, procedure: procedure)
+      end
+    end
+
     trait :with_yes_no do
       after(:build) do |procedure, _evaluator|
         build(:type_de_champ_yes_no, procedure: procedure)
diff --git a/spec/models/administrateur_spec.rb b/spec/models/administrateur_spec.rb
index ce21fb67a..9da4b2c0c 100644
--- a/spec/models/administrateur_spec.rb
+++ b/spec/models/administrateur_spec.rb
@@ -163,4 +163,34 @@ describe Administrateur, type: :model do
       end
     end
   end
+
+  describe 'unused' do
+    subject { Administrateur.unused }
+
+    let(:new_admin) { create(:administrateur) }
+    let(:unused_admin) { create(:administrateur) }
+
+    before do
+      new_admin.user.update(last_sign_in_at: (6.months - 1.day).ago)
+      unused_admin.user.update(last_sign_in_at: (6.months + 1.day).ago)
+    end
+
+    it { is_expected.to match([unused_admin]) }
+
+    context 'with a hidden procedure' do
+      let(:procedure) { create(:procedure, hidden_at: 1.month.ago) }
+
+      before { unused_admin.procedures << procedure }
+
+      it { is_expected.to be_empty }
+    end
+
+    context 'with a service' do
+      let(:service) { create(:service) }
+
+      before { unused_admin.services << service }
+
+      it { is_expected.to be_empty }
+    end
+  end
 end
diff --git a/spec/system/users/brouillon_spec.rb b/spec/system/users/brouillon_spec.rb
index d590b43ed..9ceca4599 100644
--- a/spec/system/users/brouillon_spec.rb
+++ b/spec/system/users/brouillon_spec.rb
@@ -113,7 +113,7 @@ describe 'The user' do
 
     click_on 'Ajouter un élément pour'
 
-    within '.row-1' do
+    within '.repetition .row:first-child' do
       fill_in('sub type de champ', with: 'un autre texte')
     end
 
@@ -124,7 +124,7 @@ describe 'The user' do
 
     expect(page).to have_content('Supprimer', count: 2)
 
-    within '.row-1' do
+    within '.repetition .row:first-child' do
       click_on 'Supprimer l’élément'
     end