The Snapshot LV has the same UUID as the source LV of which it is a snapshot of. Hence when trying to mount the snapshot LV this mount fails with the above message in the SYSLOG
man xfs says
nouuid Don't check for double mounted file systems using the file system uuid. This is useful to mount LVM snapshot volumes, and often used in com‐ bination with "norecovery" for mounting read-only snapshots.
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# blkid | grep 83f407cb7570
/dev/mapper/mariavg-marialv: UUID="a5fbcbf8-4092-4c26-b9b5-83f407cb7570" TYPE="xfs"
/dev/mapper/mariavg-lvol0: UUID="a5fbcbf8-4092-4c26-b9b5-83f407cb7570" TYPE="xfs"
here lvol0 is the snapshot of the LV /dev/mariavg/marialv
So the lvol0 was mounted using --nouuid option
mount -t xfs -o nouuid /dev/mariavg/lvol0 /mnt/marialvbackup/
