HTTP 423 Locked is a WebDAV status code indicating the resource being accessed is locked. The lock may be a write lock preventing modifications until the lock holder releases it.
Another user or process has a write lock on the resource, preventing modifications.
Use a PROPFIND request to see lock information on the resource.
Locks have a timeout. Wait for the lock to expire or ask the lock holder to release it.
Administrators can force-remove locks using an UNLOCK request with the lock token.