1 files changed, 4 insertions, 1 deletions
diff --git a/app/controllers/projects/merge_requests_controller.rb b/app/controllers/projects/merge_requests_controller.rb
index d3fe441c4d2..6a8c7166b39 100644
--- a/app/controllers/projects/merge_requests_controller.rb
+++ b/app/controllers/projects/merge_requests_controller.rb
@@ -258,6 +258,9 @@ class Projects::MergeRequestsController < Projects::ApplicationController
     else
       render "edit"
     end
+  rescue ActiveRecord::StaleObjectError
+    @conflict = true
+    render :edit
   end
 
   def remove_wip
@@ -493,7 +496,7 @@ class Projects::MergeRequestsController < Projects::ApplicationController
       :title, :assignee_id, :source_project_id, :source_branch,
       :target_project_id, :target_branch, :milestone_id,
       :state_event, :description, :task_num, :force_remove_source_branch,
-      label_ids: []
+      :lock_version, label_ids: []
     )
   end