Re-register computer issue - no tamper protection password

We have just started using Sophos Cloud. A computer was registered using a link from the wrong persons email. We deleted that computer from the Cloud. Now we cannot re-register that computer because of tamper protection on that computer. We cannot get the password because the computer has been deleted. Is there a way to retrieve the password after to computer has been deleted? Is there a way to uninstall without the password? This is version 11.2.5 Cloud