During a Veeam vPower NFS-based operation (SureBackup, Instant Recovery, Instant Disk Recovery, or Other-OS FLR), the following errors may occur:
Unable to mount vPower NFS volume (<mountserver_ip>:/VeeamBackup_<mountserver>). Fault "AlreadyExistsFault",
Error The specified key, name, or identifier already exists.
Unable to create datastore VeeamBackup_<mountserver_ip> on host <esxi_host>, because it already exists
The Datastore that Veeam Backup & Replication will attempt to create will always start with the prefix 'VeeamBackup_' and the ending with the Mount Server's hostname, FQDN, or IP.