This is really weird. / #3956

Actually when upgrading the admin user should already be there. Are there any more details about the sql-error? Maybe in the errors.log?

I tested upgrading and it worked find for me. The missing sql-file is just fine, because the upgrading steps are done in single migration steps. Or least they should be...

Maybe the _settings/db_settings.inc.php file is missing but the database still exist?