[ovirt-users] Unable to start VM after oVirt Upgrade from 4.2.0 to 4.2.1

Hello! In my test system I upgraded from 4.2.0 to 4.2.1 and I can't start any VM. Hosted engine starts regularly. I have a sigle host with Hosted Engine. Host cpu is a Intel(R) Xeon(R) CPU E3-1220 V2 @ 3.10GHz When I start any VM I get this error: "The CPU type of the cluster is unknown. Its possible to change the cluster cpu or set a different one per VM." All VMs have " Guest CPU Type: N/D" Cluster now has CPU Type "Intel Conroe Family" (I don't remember cpu type before the upgrade), my CPU should be Ivy Bridge but it isn't in the dropdown list. If I try to select a similar cpu (SandyBridge IBRS) I get an error. I can't chage cluster cpu type when I have running hosts with a lower CPU type. I can't put host in maintenance because  hosted engine is running on it. How I can solve?