Don't overwrite namespaces while renaming
This is checked on the GitLab side, but better safe than sorry.
Regarding: https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/14274/diffs#note_41424860
This is checked on the GitLab side, but better safe than sorry.
Regarding: https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/14274/diffs#note_41424860