[ovirt-users]Re: oVirt Administration Portal will not load after upgrade to 4.5.7

That must be what happened, even though I didn't see any error messages. One of my colleagues installed 4.5.7 in a virtualbox VM and then spent some time comparing the databases. He was able to insert the missing items from the newer installation into our engine database and that seems to have fixed the issues. There was more missing from the database than just the MigrationPolicies row. I'm not sure how much was missing. The error messages would change when he added an item, he would diagnose the message, add another item, and repeat.