diff --git a/app/tasks/maintenance/delete_orphaned_champs_with_missing_dossier_task.rb b/app/tasks/maintenance/delete_orphaned_champs_with_missing_dossier_task.rb
deleted file mode 100644
index 533eb25df..000000000
--- a/app/tasks/maintenance/delete_orphaned_champs_with_missing_dossier_task.rb
+++ /dev/null
@@ -1,33 +0,0 @@
-# frozen_string_literal: true
-
-module Maintenance
-  # On our production environment, the fk between `champs.dossier_id` and `dossiers.id` had not been created
-  # this maintenance task cleans up orphaned champ pointing to deleted dossier
-  # next step is to validate the recreated fk
-  # For our own record, use it with  PG_STATEMENT_TIMEOUT=300000 ....
-  class DeleteOrphanedChampsWithMissingDossierTask < MaintenanceTasks::Task
-    def collection
-      Champ.select(:id, :type).where.missing(:dossier)
-    end
-
-    def process(champ)
-      champ.reload # in case we need more data on this champ
-
-      case champ.type
-      when 'Champs::CarteChamp' then
-        champ.geo_areas.delete_all
-      when 'Champs::RepetitionChamp' then
-        champ.champs.delete_all
-      when 'Champs::SiretChamp' then
-        etablissement = champ.etablissement
-        champ.update(etablissement_id: nil)
-        etablissement.delete
-      end
-      champ.delete
-    end
-
-    def count
-      # no count, it otherwise it will timeout
-    end
-  end
-end
diff --git a/lib/tasks/deployment/20240827085815_delete_orphaned_champs_with_missing_dossier.rake b/lib/tasks/deployment/20240827085815_delete_orphaned_champs_with_missing_dossier.rake
new file mode 100644
index 000000000..890d1ae72
--- /dev/null
+++ b/lib/tasks/deployment/20240827085815_delete_orphaned_champs_with_missing_dossier.rake
@@ -0,0 +1,18 @@
+# frozen_string_literal: true
+
+namespace :after_party do
+  desc 'Deployment task: delete_orphaned_champs_with_missing_dossier'
+  task delete_orphaned_champs_with_missing_dossier: :environment do
+    puts "Running deploy task 'delete_orphaned_champs_with_missing_dossier'"
+
+    Champ.select(:id, :type).where.missing(:dossier).each do |champ|
+      champ.champs.destroy_all if champ.type == 'Champs::RepetitionChamp'
+      champ.destroy
+    end
+
+    # Update task as completed.  If you remove the line below, the task will
+    # run with every deploy (or every time you call after_party:run).
+    AfterParty::TaskRecord
+      .create version: AfterParty::TaskRecorder.new(__FILE__).timestamp
+  end
+end
diff --git a/spec/tasks/maintenance/delete_orphaned_champs_with_missing_dossier_task_spec.rb b/spec/tasks/maintenance/delete_orphaned_champs_with_missing_dossier_task_spec.rb
deleted file mode 100644
index 60a171e74..000000000
--- a/spec/tasks/maintenance/delete_orphaned_champs_with_missing_dossier_task_spec.rb
+++ /dev/null
@@ -1,47 +0,0 @@
-# frozen_string_literal: true
-
-require "rails_helper"
-
-module Maintenance
-  RSpec.describe DeleteOrphanedChampsWithMissingDossierTask do
-    describe "#process" do
-      let(:procedure) { create(:procedure, types_de_champ_public:) }
-      let(:dossier) { create(:dossier, :with_populated_champs, procedure:) }
-      let(:champ) { dossier.champs.first }
-
-      subject(:process) { described_class.process(champ) }
-
-      context 'with other champs' do
-        let(:types_de_champ_public) { [{ type: :text }] }
-        it 'delete champ' do
-          expect { subject }.to change { Champ.exists?(champ.id) }.from(true).to(false)
-        end
-      end
-
-      context "with carte" do
-        let(:types_de_champ_public) { [{ type: :carte }] }
-        it 'deletes champ.geo_areas' do
-          geo_area_ids = champ.geo_areas.ids
-          expect { subject }.to change { GeoArea.where(id: geo_area_ids).count }.from(2).to(0)
-          expect(Champ.exists?(champ.id)).to be_falsey
-        end
-      end
-
-      context "with repetition" do
-        let(:types_de_champ_public) { [{ type: :repetition, mandatory: true, children: [{ type: :text }] }] }
-        it 'deletes champ.champs (children)' do
-          expect { subject }.to change { champ.champs.count }.from(2).to(0)
-          expect(Champ.exists?(champ.id)).to be_falsey
-        end
-      end
-
-      context "with siret" do
-        let(:types_de_champ_public) { [{ type: :siret }] }
-        it 'delete champ.etablissement' do
-          expect { subject }.to change { Etablissement.exists?(champ.etablissement_id) }.from(true).to(false)
-          expect(Champ.exists?(champ.id)).to be_falsey
-        end
-      end
-    end
-  end
-end