If one of your co-workers acquires a lock and then goes on holiday without releasing it, what do you do? GXserver provides a means to force locks. Releasing a lock held by someone else is referred to as Breaking the lock, and forcibly acquiring a lock which someone else already holds is referred to as Stealing the lock. Naturally these are not things you should do lightly, try first the contact with your co-workers.
Locks are recorded in the repository, and a lock token is created in your local working copy. If there is a discrepancy, for example if someone else has broken the lock, the local lock token becomes invalid. The repository is always the definitive reference. You can check locks on the GXserver console locks menu.