FMV2339W
The Hyper-V VM 'vmname' is in a "branch" state compared to the last
backup. Incremental Forever - Incremental backup cannot be performed.
An Incremental Forever - Full backup will be performed instead.
Explanation
The VM state is in a "branch" compared to the last backup. This causes a fallback to Incremental Forever - Full as backup consistency in this state is not guaranteed.
System action
An Incremental Forever - Full backup will be performed.
User response
None.