What you need to know about the Veeam Backup Temporary Snapshot Not Deleted message
If you see the Veeam Backup Temporary Snapshot Not Deleted message in the Veeam Backup & Replication console, it means that a temporary snapshot created for the VMs during the backup job was not deleted.
This message does not indicate a problem with the backup job. The temporary snapshot will be automatically deleted when the backup job is completed.