diff --git a/app/models/dossier.rb b/app/models/dossier.rb
index 7c4ddc06e..beefeb48e 100644
--- a/app/models/dossier.rb
+++ b/app/models/dossier.rb
@@ -74,7 +74,7 @@ class Dossier < ApplicationRecord
   has_many :avis, inverse_of: :dossier, dependent: :destroy
   has_many :traitements, -> { order(:processed_at) }, inverse_of: :dossier, dependent: :destroy
 
-  has_many :dossier_operation_logs, -> { order(:created_at) }, dependent: :nullify, inverse_of: :dossier
+  has_many :dossier_operation_logs, -> { order(:created_at) }, inverse_of: :dossier
 
   belongs_to :groupe_instructeur, optional: false
   belongs_to :revision, class_name: 'ProcedureRevision', optional: false
diff --git a/db/migrate/20201117122923_remove_dossier_operation_log_foreign_key.rb b/db/migrate/20201117122923_remove_dossier_operation_log_foreign_key.rb
new file mode 100644
index 000000000..b472d7a7e
--- /dev/null
+++ b/db/migrate/20201117122923_remove_dossier_operation_log_foreign_key.rb
@@ -0,0 +1,5 @@
+class RemoveDossierOperationLogForeignKey < ActiveRecord::Migration[6.0]
+  def change
+    remove_foreign_key :dossier_operation_logs, :dossiers
+  end
+end
diff --git a/db/schema.rb b/db/schema.rb
index 1d51fe378..398f529b7 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: 2020_11_10_155516) do
+ActiveRecord::Schema.define(version: 2020_11_17_122923) do
 
   # These are extensions that must be enabled in order to support this database
   enable_extension "plpgsql"
@@ -709,7 +709,6 @@ ActiveRecord::Schema.define(version: 2020_11_10_155516) do
   add_foreign_key "closed_mails", "procedures"
   add_foreign_key "commentaires", "dossiers"
   add_foreign_key "dossier_operation_logs", "bill_signatures"
-  add_foreign_key "dossier_operation_logs", "dossiers"
   add_foreign_key "dossier_operation_logs", "instructeurs"
   add_foreign_key "dossiers", "groupe_instructeurs"
   add_foreign_key "dossiers", "procedure_revisions", column: "revision_id"