How To Solve “XFS: Filesystem has duplicate UUID – can’t mount”

To bridle this, you can mount your XFS filesystem at runtime using nouuid option with the mount command.

sudo mount -o rw,nouuid /dev/sda3 /mnt

If you reboot your solution, this solution won’t work. You have to use nouuid every time you want to mount. For a permanent solution, generate a new UUID for this partition using xfs_admin command-line tool:

$ sudo xfs_admin -U generate /dev/sdb3
Clearing log and setting UUID
writing all SBs
new UUID = 95d271cc-2987-43cd-abbb-bf44eddf158d

After the generation of a new UUID, you can mount the affected partition normally.