Config lock will not allow other administrators to make changes unless it has been removed.
Cause
HA synchronization will not work if the config lock is in placed, which may cause the configuration to be out of sync between HA pairs.
Resolution
The config lock should be removed in order for the HA configuration sync to occur successfully.
In the following image, the lock symbol represents a config lock:
See Also
For more information on config/commit lock, refer to the Locking Transactions section of the Web Interface Reference Guide or the Administrator's Guide (prior to PAN-OS 6.0):