In some situations, one or more files were locked for editing by some person and that person had not pushed that repository back to the Git host. This can create problems, as those locked files cannot then be worked upon by others. In such a case, the owner of the repositories can force the server to remove the locks.
So this command can ONLY be executed by the owner of the selected repository. To prove ownership, the repository name must be seen in the Management page's list of repositories.
IMPORTANT
Please inform the person who had locked the file(s) about this removal. That person would have to delete the said file(s) and do a Git pull else that person would get errors later on with Git.