@Tom-Elliott I made a mistake – Our current FOG version is actually 1.5.9 but the php version is still 7.2.24. Would that change the possibilities of a PHP upgrade ?
@leonjv The FOG 1.5.9 installer was not smart enough to check for an exiting DB and tried to use whatever it considered right. This was fixed in the latest dev-branch version (github commit). You can wait for the next release or use the dev-branch version.