I just deleted myopenhab account, with the intention to re-register it as it was not allowing to save the UUID, however now that I am in the process to register it again, it says: UUID is already in use on another account.
If you uninstall the opencloud binding then reinstall it should create a new UUID but you should verify this by looking at the file first.
File location is: /var/lib/openhab2/uuid /var/lib/openhab2/openhabcloud/secret
If a new UUID is not created then you can remove it manually then uninstall/reinstall the binding to get it. The secret info shouldn’t make a difference but I added the location just in case.