diff --git a/app/models/procedure.rb b/app/models/procedure.rb
index b2e6cb781..7c097252f 100644
--- a/app/models/procedure.rb
+++ b/app/models/procedure.rb
@@ -1,8 +1,6 @@
 require Rails.root.join('lib', 'percentile')
 
 class Procedure < ApplicationRecord
-  self.ignored_columns = [:administrateur_id]
-
   MAX_DUREE_CONSERVATION = 36
 
   has_many :types_de_piece_justificative, -> { ordered }, dependent: :destroy
diff --git a/lib/tasks/deployment/20190429103024_add_procedure_administrateur_to_administrateurs_for_hidden_procedures.rake b/lib/tasks/deployment/20190429103024_add_procedure_administrateur_to_administrateurs_for_hidden_procedures.rake
new file mode 100644
index 000000000..182387bf4
--- /dev/null
+++ b/lib/tasks/deployment/20190429103024_add_procedure_administrateur_to_administrateurs_for_hidden_procedures.rake
@@ -0,0 +1,19 @@
+namespace :after_party do
+  desc 'Deployment task: add_procedure_administrateur_to_administrateurs_for_hidden_procedures'
+  task add_procedure_administrateur_to_administrateurs_for_hidden_procedures: :environment do
+    rake_puts "Running deploy task: 'add_procedure_administrateur_to_administrateurs_for_hidden_procedures'"
+    hidden_procedures = Procedure.unscoped.hidden.includes(:administrateurs)
+    progress = ProgressReport.new(hidden_procedures.count)
+
+    hidden_procedures.find_each do |procedure|
+      deprecated_administrateur = Administrateur.find_by(id: procedure.administrateur_id)
+      if deprecated_administrateur && !procedure.administrateurs.include?(deprecated_administrateur)
+        procedure.administrateurs << deprecated_administrateur
+      end
+      progress.inc
+    end
+
+    progress.finish
+    AfterParty::TaskRecord.create version: '20190429103024'
+  end
+end
diff --git a/spec/models/dossier_spec.rb b/spec/models/dossier_spec.rb
index 0ab8763f5..ea85160af 100644
--- a/spec/models/dossier_spec.rb
+++ b/spec/models/dossier_spec.rb
@@ -31,7 +31,7 @@ describe Dossier do
     let(:procedure) { create(:procedure, duree_conservation_dossiers_dans_ds: 6) }
     let!(:young_dossier) { create(:dossier, procedure: procedure) }
     let!(:expiring_dossier) { create(:dossier, :en_instruction, en_instruction_at: 170.days.ago, procedure: procedure) }
-    let!(:just_expired_dossier) { create(:dossier, :en_instruction, en_instruction_at: (6.months + 1.second).ago, procedure: procedure) }
+    let!(:just_expired_dossier) { create(:dossier, :en_instruction, en_instruction_at: (6.months + 1.hour + 1.second).ago, procedure: procedure) }
     let!(:long_expired_dossier) { create(:dossier, :en_instruction, en_instruction_at: 1.year.ago, procedure: procedure) }
 
     context 'with default delay to end of retention' do