Close a Merge Request
You must close a merge request after the review branch has been merged. However, it isn’t necessary to merge the review branch to the target branch before closing a merge request. You can close a merge request if it was created by mistake or if you just don’t want to merge the review branch to the target branch.
Make sure that you perform any needed merge actions before you close the request because once a merge request is closed, you can’t merge the review branch, add comments, or review the source code: