What were you trying to do that didn't work?

An error occurs when attempting to convert logical volume to RAID1 with multiple mirrors. The error message appears during the execution of lvconvert with --type raid1 --mirrors 3 on an existing thin pool logical volume.

Please provide the package NVR for which the bug is seen:

lvm2-2.03.28-1.el9

How reproducible is this bug?:

always

Steps to reproduce

1. vgcreate --force testvg /dev/loop0 /dev/loop1 /dev/loop2 /dev/loop3
2. lvcreate -L4M --thin testvg/pool
3. lvconvert --type raid1 --mirrors 3 --yes testvg/pool_tdata

Expected results

The command should succeed.

Actual results

The lvconvert command fails with a "Duplicate LV name" error.