<!--IssueSummary start--> <details> <summary> Everyone can contribute. [Help move this issue forward](https://handbook.gitlab.com/handbook/marketing/developer-relations/contributor-success/community-contributors-workflows/#contributor-links) while earning points, leveling up and collecting rewards. </summary> - [Close this issue](https://contributors.gitlab.com/manage-issue?action=close&projectId=278964&issueIid=435212) </details> <!--IssueSummary end--> Currently we do not have any validation to ensure there is only 1 global `PushRule` which means if we create a second one the first rule is overridden and hidden. We should create a validation to ensure this can't happen.