[ovirt-users] Requirements to put to cluster version 4.6

Hello, I updated all my 3 CentOS 4.4.5 hosts to 4.4.6. Or at least upgrading them from the GUI I see now they are on CentOS 8.4 and: [root@ov200 ~]# rpm -qa| grep 4.4.6 ovirt-release44-4.4.6.3-1.el8.noarch ovirt-host-4.4.6-1.el8.x86_64 ovirt-host-dependencies-4.4.6-1.el8.x86_64 [root@ov200 ~]# How to see from the webadmin GUI or from the Host Console that they are indeed 4.4.6? If I try to set cluster compatibility version to 4.6 I get: Error while executing action: Cannot change Cluster Compatibility Version to higher version when there are active Hosts with lower version. -Please move Host ov300, ov301, ov200 with lower version to maintenance first. I don't remember the need of giving downtime to get new cluster version... Or what are further requirements (and benefits....) to upgrade to 4.6? Thanks, Gianluca