[Libguestfs] Cannot import converted vm to ovirt with virt-p2v

Hello! I convirted a physical machine with virt-p2v successfully. But now I have problems with the import to oVirt. Event log says: "Failed to import Vm convirttest to data-cluster-1" Also in the engine.log I got the following error: http://pastebin.com/yWgB8NTL I already tried to generate a new UUID for the image of the harddrive, but that has no effect. Any help is much appreciated! Best regards, Tim