### Summary I have a merge request that I want to merge. Whenever I click "Rebase" or "Rebase without pipeline", I get the error "Something went wrong. Please try again." ### Steps to reproduce 1. Create repo `xxx` with main branch `xxx/master` 2. Create branch `xxx/abc` from `xxx/master` 3. Commit anything to branch `xxx/abc` 4. Create fork `zzz` from `xxx` 5. Commit anything to `zzz/master` 6. Open merge request from `zzz/master` to `xxx/master` 7. Change merge request target to `xxx/abc` 8. Try to rebase ### Example Project https://gitlab.com/zehkira/myuzi/-/merge_requests/26 ### What is the current *bug* behavior? The message "Something went wrong. Please try again." pops up. ### What is the expected *correct* behavior? The rebase succeeds. ### Relevant logs and/or screenshots    ### Output of checks <!-- If you are reporting a bug on GitLab.com, uncomment below --> This bug happens on GitLab.com