<!--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=521154) </details> <!--IssueSummary end--> Follow on from https://gitlab.com/gitlab-org/gitlab/-/issues/520956+ In https://gitlab.com/gitlab-org/gitlab/-/merge_requests/182403+ we have ensured we are not running owner validations against exclusion entries e.g. ``` !/path/to/be/excluded ``` During the review we [discussed adding anther check](https://gitlab.com/gitlab-org/gitlab/-/merge_requests/182403#note_2364549383) to ensure these entries do not have an owner assigned e.g. ``` !/path/to/be/excluded @user @group ``` As these owners will not be applied. Currently it seems that this wouldn't cause a parsing error but they will be ignored so we should highlight this to users