No user can remove branch , because of lock file on gitlab server.
remote: error: cannot lock ref 'refs/heads/feature/WM2-1040': Unable to create '/var/opt/gitlab/git-data-file03/repositories/wiremo/wiremo-dashboard.git/./refs/heads/feature/WM2-1040.lock': File exists. remote: remote: Another git process seems to be running in this repository, e.g. remote: an editor opened by 'git commit'. Please make sure all processes remote: are terminated then try again. If it still fails, a git process remote: may have crashed in this repository earlier: remote: remove the file manually to continue. To https://gitlab.com/wiremo/wiremo-dashboard.git ! [remote rejected] feature/WM2-1040 (failed to update ref) error: failed to push some refs to 'https://gitlab.com/wiremo/wiremo-dashboard.git'