Sorry to reply so late now … the problem with the later version of FOG - as I painfully discovered - is that they have difficult time to migrate the schema. The schema said it “migrated successfully” but not in actuality.
I ended up using PHPmyadmin to manually export the hosts, change a few table names, export the mac addresses, match them up with host IDs, etc. etc. etc. … painful process, but once the correct fields were entered, the whole thing was smooth !