Hello 

          When we try to complete the upgrade to 4.5.1 there is a failure to upgrade the cluster to compatibly version 4.7

 Cannot update compatibility version of Vm/Template: [HostedEngine], Message: There was an attempt to change Hosted Engine VM values that are locked.

Also somehow the cluster had changed to Cluster Node Type of Virt only but there was an error due to started volumes when trying to change the Cluster from the WebUI.

I fixed this by changing it in the DB.