diff --git a/app/controllers/users/dossiers_controller.rb b/app/controllers/users/dossiers_controller.rb
index fd14fa203..88e1930a3 100644
--- a/app/controllers/users/dossiers_controller.rb
+++ b/app/controllers/users/dossiers_controller.rb
@@ -590,7 +590,7 @@ module Users
     end
 
     def dossier_params
-      params.require(:dossier).permit(:for_tiers, :mandataire_first_name, :mandataire_last_name, individual_attributes: [:gender, :nom, :prenom, :birthdate, :email, :notification_method, :id])
+      params.require(:dossier).permit(:for_tiers, :mandataire_first_name, :mandataire_last_name, individual_attributes: [:gender, :nom, :prenom, :birthdate, :email, :notification_method])
     end
 
     def siret_params
diff --git a/app/views/users/dossiers/identite.html.haml b/app/views/users/dossiers/identite.html.haml
index 749879e13..d34288325 100644
--- a/app/views/users/dossiers/identite.html.haml
+++ b/app/views/users/dossiers/identite.html.haml
@@ -38,7 +38,7 @@
         .fr-fieldset__element.fr-fieldset__element--short-text
           = render Dsfr::InputComponent.new(form: f, attribute: :mandataire_last_name, opts: { "data-for-tiers-target" => "mandataireLastName" })
 
-    = f.fields_for :individual do |individual|
+    = f.fields_for :individual, include_id: false do |individual|
       .individual-infos
         %fieldset.fr-fieldset
           %legend.fr-fieldset__legend--regular.fr-fieldset__legend{ "data-for-tiers-target" => "mandataireTitle" }