Try this command on the host: vdsm-tool remove-config, vdsm-tool configure --force; If it
will not work, you can stop your VMs with virsh, install a "clean" setup of the
hosted engine and import your storage with all VMs. I think if it possible, installing a
new HE and manually set some parameters, IMHO, a "little bit" faster, that
trying to restore HE with different major releases.