Issue background
In certain cases, phantom locks can remain on fragments such as parts, sections or amendments. They are called phantom locks as the lock will not be visible to the user that is purported to have that lock and so they are unable to release the lock using the normal method of saving or discarding their changes.
In these rare cases, users can use the Release All Locks feature, but they should do so with caution.
How to release phantom locks
See Releasing Locks
If you are releasing locks in a document, make sure you are not unwittingly going to release genuine locks held by other users as it will release all locks in the document.
To ensure you are only releasing locks on the phantom lock, open that fragment using https://lawmaker.atlassian.net/l/cp/czcSgu6m