Chris Cranford, I see that targetEntity = ActualPerson.class also works.

An @AttributeOverride should have been added to {ActualPerson to override the column mapping for #personId instead of adding the property, but I see that results in the same failure. I'm guessing that ActualPerson#personId was added to workaround the same failure in an earlier version.

I think this should work with out an explicit targetEntity attribute.