Merge branch 'Ben305/gitlab-ce-36669-default-mr-title-with-external-issues' into 'master'

Resolve "Incorrect default merge request title when Jira activated"

Closes #36669

See merge request gitlab-org/gitlab-ce!16356

1 files changed, 2 insertions, 6 deletions

diff --git a/app/services/merge_requests/build_service.rb b/app/services/merge_requests/build_service.rb
index 9622a5c5462..22b9b91a957 100644
--- a/app/services/merge_requests/build_service.rb
+++ b/app/services/merge_requests/build_service.rb
@@ -154,13 +154,9 @@ module MergeRequests
     end
 
     def assign_title_from_issue
-      return unless issue
+      return unless issue && issue.is_a?(Issue)
 
-      merge_request.title =
-        case issue
-        when Issue         then "Resolve \"#{issue.title}\""
-        when ExternalIssue then "Resolve #{issue.title}"
-        end
+      merge_request.title = "Resolve \"#{issue.title}\""
     end
 
     def issue_iid