Here’s how to fix a duplicate UUID on a XFS file system.
mount -o rw,nouuid /dev/sda1 /data
Mounting with nouuid will work, but not after a reboot.
To avoid a duplicate ID, run this command to generate a new UUID.
xfs_admin -U generate /dev/sda3 Clearing log and setting UUID writing all SBs new UUID = xxxxx-xxxx-xxxx-xxxxxxxxx