Fix ANS1715E different virtual machine UUID error message

When backing up a virtual machine for which the UUID has changed, the following error is thrown:
ANS4308E Full VM backup of 'Hyper-V' Virtual Machine 'WS50115' failed with RC=4379 mode=Incremental Forever - Incremental, target node name='CLSIM261_HV_TGT', data mover node name='SVSIM1CP_HV_DM'
ANS1715E A file space already exists for virtual machine (WS50115), but with a different virtual machine UUID (5A28306B-3B9A-4DD8-A481-0F4FD6A9D39F) than the current virtual machine UUID (533DB73A-E72F-47D7-B03A-F7EE91EB0A9A).
ANS1228E Sending of object 'WS50115' failed.
ANS5226E The virtual machine backup operation failed.

Even though we are already using the option "TESTFLAG VMBACKUP_UPDATE_UUID" in the options file.

Even more weird: explicitly trying to backup the VM with option "-VMBACKUPUPDATEGUID" results in "license file does not exist or is not valid".

C:\Program Files\Tivoli\TSM\baclient>dsmc.exe backup vm WS50115 -optfile=dsm.SVSIM1CP_HV_DM.opt -asnode=CLSIM261_HV_TGT -vmbackuptype=fullvm -mode=iffull -VMBACKUPUPDATEGUID
IBM Spectrum Protect
Command Line Backup-Archive Client Interface
Client Version 8, Release 1, Level 11.0
Client date/time: 10/29/2021 10:06:44
(c) Copyright by IBM Corporation and other(s) 1990, 2020. All Rights Reserved.

Node Name: SVSIM1CP_HV_DM
Session established with server ISPCOG01: Windows
Server Version 8, Release 1, Level 12.109
Server date/time: 10/29/2021 10:06:45 Last access: 10/29/2021 10:02:38

Accessing as node: CLSIM261_HV_TGT
ANS2732E The BACKUP VM command failed because the Data Protection for Microsoft Hyper-V license file does not exist or is not valid.

C:\Program Files\Tivoli\TSM\baclient>

Checking installed IBM products clearly shows "Data Protection for Microsoft Hyper-V License" is installed!

PS C:\> wmic product get name | Select-String -Pattern "IBM"

IBM Spectrum Protect for Virtual Environments: Framework
IBM Spectrum Protect JVM
IBM Spectrum Protect WebServer
IBM Spectrum Protect for Virtual Environments: Recovery Agent
IBM Spectrum Protect Client
IBM Spectrum Protect for Virtual Environments: Data Protection for Microsoft Hyper-V License
IBM Spectrum Protect for Virtual Environments: Data Protection for Microsoft Hyper-V

Turns out that the problem has to do with the fact that the previous VM (with original UUID) was decommissioned.

Protect: ISPCOG01>q fil *_HV_TGT *WS50115 f=d

Node Name: CLSIM261_HV_TGT
Filespace Name: \VMFULL-WS50115
Hexadecimal Filespace Name:
FSID: 29
Collocation Group Name:
Platform: TDP HyperV
Filespace Type: API:TSMVM
...
Decommissioned: Yes
Decommissioned Date: 05-10-2021 04:00:15
...

After recommissioning the VM and relaunching the backup, it does proceed normally (of course, also displaying the ANS1715E message):

ANS1715E A file space already exists for virtual machine (WS50115), but with a different virtual machine UUID (5A28306B-3B9A-4DD8-A481-0F4FD6A9D39F) than the current virtual machine UUID (533DB73A-E72F-47D7-B03A-F7EE91EB0A9A).
ANS2555W The incremental backup operation was changed to a full backup for virtual machine 'WS50115' because no previous backups are found on the IBM Spectrum Protect server.

Instead of throwing error ANS1715E, the backup should throw a new error along the lines of "Can't backup because virtual machine is decommissioned"!