While reviewing my changes to approval rule indices, @patrickbajao commented (https://gitlab.com/gitlab-org/gitlab/-/merge_requests/33121#note_356677173) > I just realized we don't have a unique index for non-code owner rules (`rule_type` as `regular`). Not sure why we don't have one (we have a Rails validation for it). I think we should add one. We also need to ensure that we migrate existing records as there's a ~bug that allows adding approval rules with the same name: https://gitlab.com/gitlab-org/gitlab/-/issues/247119.