I've discovered [this](https://gitlab.com/gitlab-org/gitlab/blob/33f5b3c3bcee5e448f52a96681103e31b5fc6d7b/lib/api/merge_requests.rb#L190) while I was working on https://gitlab.com/gitlab-org/gitlab/-/issues/376941 It's marked as deprecated here for about 4 years. It seems that it's an alias according to the API doc here https://docs.gitlab.com/ee/api/merge_requests.html#create-mr I think we should check if this can be removed and remove if we can.