the UUID is already bound to the device mapper device:
% cat fstab UUID=50e5271d-665f-4edb-a023-e2f744679751 / ext4 defaults 0 0 UUID=5d9f777b-c102-4d8f-b4f5-56195c4ae21c /home ext4 defaults,nofail 0 0
% cat ls_al_byuuid total 0 drwxr-xr-x 2 root root 120 Oct 8 14:37 . drwxr-xr-x 8 root root 160 Oct 8 14:37 .. lrwxrwxrwx 1 root root 9 Oct 8 14:37 2019-10-08-09-33-25-00 -> ../../vdc lrwxrwxrwx 1 root root 10 Oct 8 14:37 50e5271d-665f-4edb-a023-e2f744679751 -> ../../dm-1 lrwxrwxrwx 1 root root 10 Oct 8 14:37 5d9f777b-c102-4d8f-b4f5-56195c4ae21c -> ../../dm-2 lrwxrwxrwx 1 root root 9 Oct 8 14:37 b53526d8-5027-430a-ae4b-73347b6a28a1 -> ../../vdb
% cat ls_al_byid total 0 drwxr-xr-x 2 root root 380 Oct 8 14:37 . drwxr-xr-x 8 root root 160 Oct 8 14:37 .. lrwxrwxrwx 1 root root 10 Oct 8 14:37 dm-name-mpath0 -> ../../dm-0 lrwxrwxrwx 1 root root 10 Oct 8 14:37 dm-name-mpath0-part1 -> ../../dm-1 lrwxrwxrwx 1 root root 10 Oct 8 14:37 dm-name-mpath0-part2 -> ../../dm-2 lrwxrwxrwx 1 root root 10 Oct 8 14:37 dm-uuid-mpath-0QEMU_QEMU_HARDDISK_IPR-0_1234567890 -> ../../dm-0 lrwxrwxrwx 1 root root 10 Oct 8 14:37 dm-uuid-part1-mpath-0QEMU_QEMU_HARDDISK_IPR-0_1234567890 -> ../../dm-1 lrwxrwxrwx 1 root root 10 Oct 8 14:37 dm-uuid-part2-mpath-0QEMU_QEMU_HARDDISK_IPR-0_1234567890 -> ../../dm-2 lrwxrwxrwx 1 root root 9 Oct 8 14:37 scsi-0QEMU_QEMU_HARDDISK_IPR-0_1234567890 -> ../../sda lrwxrwxrwx 1 root root 10 Oct 8 14:37 scsi-0QEMU_QEMU_HARDDISK_IPR-0_1234567890-part1 -> ../../sda1 lrwxrwxrwx 1 root root 10 Oct 8 14:37 scsi-0QEMU_QEMU_HARDDISK_IPR-0_1234567890-part2 -> ../../sdb2 lrwxrwxrwx 1 root root 9 Oct 8 14:37 scsi-SQEMU_QEMU_HARDDISK_IPR-0_1234567890 -> ../../sda lrwxrwxrwx 1 root root 10 Oct 8 14:37 scsi-SQEMU_QEMU_HARDDISK_IPR-0_1234567890-part1 -> ../../sda1 lrwxrwxrwx 1 root root 10 Oct 8 14:37 scsi-SQEMU_QEMU_HARDDISK_IPR-0_1234567890-part2 -> ../../sdb2 lrwxrwxrwx 1 root root 9 Oct 8 14:37 virtio-output_disk.img -> ../../vdb lrwxrwxrwx 1 root root 9 Oct 8 14:37 virtio-seed.img -> ../../vdc lrwxrwxrwx 1 root root 10 Oct 8 14:37 wwn-0xQEMU_QEMU_HARDDISK_IPR-0_1234567890 -> ../../dm-0 lrwxrwxrwx 1 root root 10 Oct 8 14:37 wwn-0xQEMU_QEMU_HARDDISK_IPR-0_1234567890-part1 -> ../../dm-1 lrwxrwxrwx 1 root root 10 Oct 8 14:37 wwn-0xQEMU_QEMU_HARDDISK_IPR-0_1234567890-part2 -> ../../dm-2
the UUID is already bound to the device mapper device:
% cat fstab 665f-4edb- a023-e2f7446797 51 / ext4 defaults 0 0 c102-4d8f- b4f5-56195c4ae2 1c /home ext4 defaults,nofail 0 0
UUID=50e5271d-
UUID=5d9f777b-
% cat ls_al_byuuid 08-09-33- 25-00 -> ../../vdc 665f-4edb- a023-e2f7446797 51 -> ../../dm-1 c102-4d8f- b4f5-56195c4ae2 1c -> ../../dm-2 5027-430a- ae4b-73347b6a28 a1 -> ../../vdb
total 0
drwxr-xr-x 2 root root 120 Oct 8 14:37 .
drwxr-xr-x 8 root root 160 Oct 8 14:37 ..
lrwxrwxrwx 1 root root 9 Oct 8 14:37 2019-10-
lrwxrwxrwx 1 root root 10 Oct 8 14:37 50e5271d-
lrwxrwxrwx 1 root root 10 Oct 8 14:37 5d9f777b-
lrwxrwxrwx 1 root root 9 Oct 8 14:37 b53526d8-
% cat ls_al_byid mpath0- part1 -> ../../dm-1 mpath0- part2 -> ../../dm-2 mpath-0QEMU_ QEMU_HARDDISK_ IPR-0_123456789 0 -> ../../dm-0 part1-mpath- 0QEMU_QEMU_ HARDDISK_ IPR-0_123456789 0 -> ../../dm-1 part2-mpath- 0QEMU_QEMU_ HARDDISK_ IPR-0_123456789 0 -> ../../dm-2 QEMU_HARDDISK_ IPR-0_123456789 0 -> ../../sda QEMU_HARDDISK_ IPR-0_123456789 0-part1 -> ../../sda1 QEMU_HARDDISK_ IPR-0_123456789 0-part2 -> ../../sdb2 QEMU_HARDDISK_ IPR-0_123456789 0 -> ../../sda QEMU_HARDDISK_ IPR-0_123456789 0-part1 -> ../../sda1 QEMU_HARDDISK_ IPR-0_123456789 0-part2 -> ../../sdb2 output_ disk.img -> ../../vdb QEMU_HARDDISK_ IPR-0_123456789 0 -> ../../dm-0 QEMU_HARDDISK_ IPR-0_123456789 0-part1 -> ../../dm-1 QEMU_HARDDISK_ IPR-0_123456789 0-part2 -> ../../dm-2
total 0
drwxr-xr-x 2 root root 380 Oct 8 14:37 .
drwxr-xr-x 8 root root 160 Oct 8 14:37 ..
lrwxrwxrwx 1 root root 10 Oct 8 14:37 dm-name-mpath0 -> ../../dm-0
lrwxrwxrwx 1 root root 10 Oct 8 14:37 dm-name-
lrwxrwxrwx 1 root root 10 Oct 8 14:37 dm-name-
lrwxrwxrwx 1 root root 10 Oct 8 14:37 dm-uuid-
lrwxrwxrwx 1 root root 10 Oct 8 14:37 dm-uuid-
lrwxrwxrwx 1 root root 10 Oct 8 14:37 dm-uuid-
lrwxrwxrwx 1 root root 9 Oct 8 14:37 scsi-0QEMU_
lrwxrwxrwx 1 root root 10 Oct 8 14:37 scsi-0QEMU_
lrwxrwxrwx 1 root root 10 Oct 8 14:37 scsi-0QEMU_
lrwxrwxrwx 1 root root 9 Oct 8 14:37 scsi-SQEMU_
lrwxrwxrwx 1 root root 10 Oct 8 14:37 scsi-SQEMU_
lrwxrwxrwx 1 root root 10 Oct 8 14:37 scsi-SQEMU_
lrwxrwxrwx 1 root root 9 Oct 8 14:37 virtio-
lrwxrwxrwx 1 root root 9 Oct 8 14:37 virtio-seed.img -> ../../vdc
lrwxrwxrwx 1 root root 10 Oct 8 14:37 wwn-0xQEMU_
lrwxrwxrwx 1 root root 10 Oct 8 14:37 wwn-0xQEMU_
lrwxrwxrwx 1 root root 10 Oct 8 14:37 wwn-0xQEMU_