NetWorker: NMM Hyper-v Backup unsupported configuration version for RCT

The User Guide states that virtual machines with a configuration version earlier than 6.2 cannot be backed up.
NMM does not support RCT-based backups of Hyper-V virtual machines with a configuration version earlier than 6.2.

After upgrading the operating system from 2012 R2 to 2016, 2019, or 2022, upgrade the virtual machine configuration version to 6.2 or later.

To upgrade multiple virtual machines,
Run the following PowerShell command: get-vm | Update-VMVersion –A

When you check the virtual machine version, it is higher than 6.2 which should be supported.

Despite that backup fails with error:

Savesets Failed = 1 
APPLICATIONS:\Microsoft Hyper-V\VMname, - Reason: Saveset contains VM with configuration version that is unsupported for RCT 

This is happening because of a virtual machine naming conflict:
It could be that Hyper-v Manager and Failover cluster manager having different names.
Or, both have the same name but the Failover cluster manager reports cluster resource name different than the group name when you query the VM name.


However when you query the cluster resources.


When listing the Savesets using nsrnmmsv -P command, it shows the name reported in the get-VM output.

 nsrnmmsv -P -A NSR_FEDERATED_BACKUP=yes -A NSR_APP_TYPE=HYPERV
"APPLICATIONS:\Microsoft Hyper-V\usermachine"

get-VM
get-custeresrource

Also see NMM Hyper-v RCT backup fails with Reason: Saveset contains VM with configuration version that is unsupported for RCT.