1 files changed, 2 insertions, 2 deletions
diff --git a/lib/banzai/filter/milestone_reference_filter.rb b/lib/banzai/filter/milestone_reference_filter.rb
index c70c3f0c04e..fce042e8946 100644
--- a/lib/banzai/filter/milestone_reference_filter.rb
+++ b/lib/banzai/filter/milestone_reference_filter.rb
@@ -101,9 +101,9 @@ module Banzai
 
       def self_and_ancestors_ids(parent)
         if group_context?(parent)
-          parent.self_and_ancestors_ids
+          parent.self_and_ancestors.select(:id)
         elsif project_context?(parent)
-          parent.group&.self_and_ancestors_ids
+          parent.group&.self_and_ancestors&.select(:id)
         end
       end