diff --git a/app/models/procedure.rb b/app/models/procedure.rb
index a93d73a5f..b9760fa41 100644
--- a/app/models/procedure.rb
+++ b/app/models/procedure.rb
@@ -66,7 +66,7 @@ class Procedure < ApplicationRecord
   validates :description, presence: true, allow_blank: false, allow_nil: false
   validates :administrateurs, presence: true
   validate :check_juridique
-  validates :path, format: { with: /\A[a-z0-9_\-]{3,50}\z/ }, uniqueness: { scope: :aasm_state, case_sensitive: false }, presence: true, allow_blank: false, allow_nil: true
+  validates :path, presence: true, format: { with: /\A[a-z0-9_\-]{3,50}\z/ }, uniqueness: { scope: [:path, :archived_at, :hidden_at], case_sensitive: false }
   # FIXME: remove duree_conservation_required flag once all procedures are converted to the new style
   validates :duree_conservation_dossiers_dans_ds, allow_nil: false, numericality: { only_integer: true, greater_than_or_equal_to: 1, less_than_or_equal_to: MAX_DUREE_CONSERVATION }, if: :durees_conservation_required
   validates :duree_conservation_dossiers_hors_ds, allow_nil: false, numericality: { only_integer: true, greater_than_or_equal_to: 0 }, if: :durees_conservation_required
diff --git a/db/migrate/20190917151652_make_path_nonnull.rb b/db/migrate/20190917151652_make_path_nonnull.rb
new file mode 100644
index 000000000..401a13c84
--- /dev/null
+++ b/db/migrate/20190917151652_make_path_nonnull.rb
@@ -0,0 +1,6 @@
+class MakePathNonnull < ActiveRecord::Migration[5.2]
+  def change
+    change_column_null :procedures, :path, false
+    add_index :procedures, [:path, :archived_at, :hidden_at], unique: true
+  end
+end
diff --git a/db/schema.rb b/db/schema.rb
index 330d17d99..9914c4180 100644
--- a/db/schema.rb
+++ b/db/schema.rb
@@ -10,7 +10,7 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema.define(version: 2019_09_17_120856) do
+ActiveRecord::Schema.define(version: 2019_09_17_151652) do
 
   # These are extensions that must be enabled in order to support this database
   enable_extension "plpgsql"
@@ -480,12 +480,13 @@ ActiveRecord::Schema.define(version: 2019_09_17_120856) do
     t.string "cadre_juridique"
     t.boolean "juridique_required", default: true
     t.boolean "durees_conservation_required", default: true
-    t.string "path"
+    t.string "path", null: false
     t.string "declarative_with_state"
     t.text "monavis_embed"
     t.index ["declarative_with_state"], name: "index_procedures_on_declarative_with_state"
     t.index ["hidden_at"], name: "index_procedures_on_hidden_at"
     t.index ["parent_procedure_id"], name: "index_procedures_on_parent_procedure_id"
+    t.index ["path", "archived_at", "hidden_at"], name: "index_procedures_on_path_and_archived_at_and_hidden_at", unique: true
     t.index ["service_id"], name: "index_procedures_on_service_id"
   end
 
diff --git a/spec/factories/procedure.rb b/spec/factories/procedure.rb
index 118b1c7d5..23b32efa7 100644
--- a/spec/factories/procedure.rb
+++ b/spec/factories/procedure.rb
@@ -11,6 +11,7 @@ FactoryBot.define do
     duree_conservation_dossiers_hors_ds { 6 }
     ask_birthday { false }
     lien_site_web { "https://mon-site.gouv" }
+    path { SecureRandom.uuid }
 
     transient do
       administrateur {}