* Root password of a cluster node is required for adding nodes.
-NOTE: It is not possible to mix Proxmox VE 3.x and earlier with
-Proxmox VE 4.0 cluster nodes.
+NOTE: It is not possible to mix {pve} 3.x and earlier with {pve} 4.X cluster
+nodes.
+
+NOTE: While it's possible for {pve} 4.4 and {pve} 5.0 this is not supported as
+production configuration and should only used temporarily during upgrading the
+whole cluster from one to another major version.
Preparing Nodes
pvecm expected 1
----
-And the repeat the 'pvecm delnode' command.
+And then repeat the 'pvecm delnode' command.
Now switch back to the separated node, here delete all remaining files left
from the old cluster. This ensures that the node can be added to another