<!--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=524445) </details> <!--IssueSummary end--> With https://gitlab.com/gitlab-org/gitlab/-/merge_requests/182679 we implemented event tracking for several placeholder user reassignment events. At the moment we track failure to `propose_placeholder_user_reassignment` and `accept_placeholde_user_reassignnment` We now want to add tracking for system failures on the following events: - failure to `keep_as_placeholder` - failure to `keep_all_as_placeholder` - failure to `cancel_placeholder_user_reassignment` - failure to `reject_placeholder_user_reassignment` We should be able to use the already defined `fail_placeholder_user_reassignment` event for cancel and reject, but will likely need to define a new events: `fail_keep_as_placeholder_user` and `fail_keep_all_as_placeholder_user`