[Rails5] Fix 'Invalid single-table inheritance type: Group is not a subclass of Gitlab::BackgroundMigration::FixCrossProjectLabelLinks::Namespace'

1 files changed, 2 insertions, 0 deletions

diff --git a/lib/gitlab/background_migration/fix_cross_project_label_links.rb b/lib/gitlab/background_migration/fix_cross_project_label_links.rb
index fa68ba5cca7..0a12401c35f 100644
--- a/lib/gitlab/background_migration/fix_cross_project_label_links.rb
+++ b/lib/gitlab/background_migration/fix_cross_project_label_links.rb
@@ -11,6 +11,7 @@ module Gitlab
       end
 
       class Label < ActiveRecord::Base
+        self.inheritance_column = :_type_disabled
         self.table_name = 'labels'
       end
 
@@ -27,6 +28,7 @@ module Gitlab
       end
 
       class Namespace < ActiveRecord::Base
+        self.inheritance_column = :_type_disabled
         self.table_name = 'namespaces'
 
         def self.groups_with_descendants_ids(start_id, stop_id)