Hi @Elvis37082719imna,
Sorry to hear you are having trouble managing your Shared device licenses.
As you mentioned, some of the machines broke down, and you no longer have access to them. To recover a license from an inoperable machine, you'll need to reset the licenses of all machines in that product profile.
Caution:
The following procedure resets the licenses of all machines in a product profile. Adobe recommends saving any unsaved work on all machines in this profile. Also, if any long-running processes are running on any of the machines in this profile, ensure that you either stop them or let them complete before proceeding.
For more details, please refer to the following help document: https://adobe.ly/40HNESR
Let us know if this helps, or feel free to reach out if you have any more queries.