[ovirt-users] Upgrade OVIRT from 3.6 to 4.3

Hi Guys! I need to upgrade from 3.6 to 4.3 and I have a doubt. Do I need to restard VMs for each upgrade (DC Compatibilty 1° 4.0 - 2° 4.1 - 3° 4.2 and 4° 4.3) or can modify the compatibilty from 3.6 to 4.2 and restart the vms in this only step. Best regards