diff --git a/Gemfile.lock b/Gemfile.lock
index 08472eebd..1a9ba160c 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -4,40 +4,40 @@ GEM
     aasm (5.2.0)
       concurrent-ruby (~> 1.0)
     acsv (0.0.1)
-    actioncable (6.1.4.6)
-      actionpack (= 6.1.4.6)
-      activesupport (= 6.1.4.6)
+    actioncable (6.1.4.7)
+      actionpack (= 6.1.4.7)
+      activesupport (= 6.1.4.7)
       nio4r (~> 2.0)
       websocket-driver (>= 0.6.1)
-    actionmailbox (6.1.4.6)
-      actionpack (= 6.1.4.6)
-      activejob (= 6.1.4.6)
-      activerecord (= 6.1.4.6)
-      activestorage (= 6.1.4.6)
-      activesupport (= 6.1.4.6)
+    actionmailbox (6.1.4.7)
+      actionpack (= 6.1.4.7)
+      activejob (= 6.1.4.7)
+      activerecord (= 6.1.4.7)
+      activestorage (= 6.1.4.7)
+      activesupport (= 6.1.4.7)
       mail (>= 2.7.1)
-    actionmailer (6.1.4.6)
-      actionpack (= 6.1.4.6)
-      actionview (= 6.1.4.6)
-      activejob (= 6.1.4.6)
-      activesupport (= 6.1.4.6)
+    actionmailer (6.1.4.7)
+      actionpack (= 6.1.4.7)
+      actionview (= 6.1.4.7)
+      activejob (= 6.1.4.7)
+      activesupport (= 6.1.4.7)
       mail (~> 2.5, >= 2.5.4)
       rails-dom-testing (~> 2.0)
-    actionpack (6.1.4.6)
-      actionview (= 6.1.4.6)
-      activesupport (= 6.1.4.6)
+    actionpack (6.1.4.7)
+      actionview (= 6.1.4.7)
+      activesupport (= 6.1.4.7)
       rack (~> 2.0, >= 2.0.9)
       rack-test (>= 0.6.3)
       rails-dom-testing (~> 2.0)
       rails-html-sanitizer (~> 1.0, >= 1.2.0)
-    actiontext (6.1.4.6)
-      actionpack (= 6.1.4.6)
-      activerecord (= 6.1.4.6)
-      activestorage (= 6.1.4.6)
-      activesupport (= 6.1.4.6)
+    actiontext (6.1.4.7)
+      actionpack (= 6.1.4.7)
+      activerecord (= 6.1.4.7)
+      activestorage (= 6.1.4.7)
+      activesupport (= 6.1.4.7)
       nokogiri (>= 1.8.5)
-    actionview (6.1.4.6)
-      activesupport (= 6.1.4.6)
+    actionview (6.1.4.7)
+      activesupport (= 6.1.4.7)
       builder (~> 3.1)
       erubi (~> 1.4)
       rails-dom-testing (~> 2.0)
@@ -55,26 +55,26 @@ GEM
       activemodel (>= 5.2.0)
       activestorage (>= 5.2.0)
       activesupport (>= 5.2.0)
-    activejob (6.1.4.6)
-      activesupport (= 6.1.4.6)
+    activejob (6.1.4.7)
+      activesupport (= 6.1.4.7)
       globalid (>= 0.3.6)
-    activemodel (6.1.4.6)
-      activesupport (= 6.1.4.6)
-    activerecord (6.1.4.6)
-      activemodel (= 6.1.4.6)
-      activesupport (= 6.1.4.6)
-    activestorage (6.1.4.6)
-      actionpack (= 6.1.4.6)
-      activejob (= 6.1.4.6)
-      activerecord (= 6.1.4.6)
-      activesupport (= 6.1.4.6)
+    activemodel (6.1.4.7)
+      activesupport (= 6.1.4.7)
+    activerecord (6.1.4.7)
+      activemodel (= 6.1.4.7)
+      activesupport (= 6.1.4.7)
+    activestorage (6.1.4.7)
+      actionpack (= 6.1.4.7)
+      activejob (= 6.1.4.7)
+      activerecord (= 6.1.4.7)
+      activesupport (= 6.1.4.7)
       marcel (~> 1.0.0)
       mini_mime (>= 1.1.0)
     activestorage-openstack (1.5.1)
       fog-openstack (~> 1.0)
       marcel
       rails (>= 5.2.2)
-    activesupport (6.1.4.6)
+    activesupport (6.1.4.7)
       concurrent-ruby (~> 1.0, >= 1.0.2)
       i18n (>= 1.6, < 2)
       minitest (>= 5.1)
@@ -502,20 +502,20 @@ GEM
       rack
     rack-test (1.1.0)
       rack (>= 1.0, < 3)
-    rails (6.1.4.6)
-      actioncable (= 6.1.4.6)
-      actionmailbox (= 6.1.4.6)
-      actionmailer (= 6.1.4.6)
-      actionpack (= 6.1.4.6)
-      actiontext (= 6.1.4.6)
-      actionview (= 6.1.4.6)
-      activejob (= 6.1.4.6)
-      activemodel (= 6.1.4.6)
-      activerecord (= 6.1.4.6)
-      activestorage (= 6.1.4.6)
-      activesupport (= 6.1.4.6)
+    rails (6.1.4.7)
+      actioncable (= 6.1.4.7)
+      actionmailbox (= 6.1.4.7)
+      actionmailer (= 6.1.4.7)
+      actionpack (= 6.1.4.7)
+      actiontext (= 6.1.4.7)
+      actionview (= 6.1.4.7)
+      activejob (= 6.1.4.7)
+      activemodel (= 6.1.4.7)
+      activerecord (= 6.1.4.7)
+      activestorage (= 6.1.4.7)
+      activesupport (= 6.1.4.7)
       bundler (>= 1.15.0)
-      railties (= 6.1.4.6)
+      railties (= 6.1.4.7)
       sprockets-rails (>= 2.0.0)
     rails-controller-testing (1.0.5)
       actionpack (>= 5.0.1.rc1)
@@ -534,9 +534,9 @@ GEM
     rails-i18n (6.0.0)
       i18n (>= 0.7, < 2)
       railties (>= 6.0.0, < 7)
-    railties (6.1.4.6)
-      actionpack (= 6.1.4.6)
-      activesupport (= 6.1.4.6)
+    railties (6.1.4.7)
+      actionpack (= 6.1.4.7)
+      activesupport (= 6.1.4.7)
       method_source
       rake (>= 0.13)
       thor (~> 1.0)
@@ -684,7 +684,7 @@ GEM
     spring (2.1.1)
     spring-commands-rspec (1.0.4)
       spring (>= 0.9.1)
-    sprockets (4.0.2)
+    sprockets (4.0.3)
       concurrent-ruby (~> 1.0)
       rack (> 1, < 3)
     sprockets-rails (3.4.2)
diff --git a/lib/tasks/deployment/20220309101504_seed_hidden_at_dossiers.rake b/lib/tasks/deployment/20220309101504_seed_hidden_at_dossiers.rake
new file mode 100644
index 000000000..ffdb19e0d
--- /dev/null
+++ b/lib/tasks/deployment/20220309101504_seed_hidden_at_dossiers.rake
@@ -0,0 +1,17 @@
+namespace :after_party do
+  desc 'Deployment task: seed_hidden_at_dossiers'
+  task seed_hidden_at_dossiers: :environment do
+    puts "Running deploy task 'seed_hidden_at_dossiers'"
+
+    Dossier
+      .with_discarded
+      .where.not(hidden_at: nil)
+      .where(hidden_by_user_at: nil, hidden_by_administration_at: nil)
+      .update_all('hidden_by_user_at = hidden_at, hidden_by_administration_at = hidden_at')
+
+    # 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