Instead, use the [`/approval_rules` endpoint](https://docs.gitlab.com/ee/api/merge_request_approvals.html#merge-request-level-mr-approvals) to [create](https://docs.gitlab.com/ee/api/merge_request_approvals.html#create-merge-request-level-rule) or [update](https://docs.gitlab.com/ee/api/merge_request_approvals.html#update-merge-request-level-rule) the approval rules for a merge request.