Sorry guys. I came back with the good news to early. Plesk repair fixed some db issues, but the migration error persists:
Execution of /opt/psa/admin/plib/api-cli/user.php --create
[email protected] -owner admin -guid 6281ad2a-d9eb-0226-0934-1573e5e17f6a -cname '' -passwd '' -passwd_type...