$ sudo ./btrfstune -U 5b66edf9-f8d8-489d-8ecf-fb601f42e79b /dev/sdb1
WARNING: ignored: dev_item fsid mismatch: 5b66edf9-f8d8-489d-8ecf-fb601f42e79b != 47814679-712c-48e1-b470-5baebe95049c
WARNING: ignored: dev_item fsid mismatch: 5b66edf9-f8d8-489d-8ecf-fb601f42e79b != 47814679-712c-48e1-b470-5baebe95049c
WARNING: ignored: dev_item fsid mismatch: 5b66edf9-f8d8-489d-8ecf-fb601f42e79b != 47814679-712c-48e1-b470-5baebe95049c
WARNING: it's highly recommended to run 'btrfs check' before this operation
WARNING: also canceling running UUID change progress may cause corruption
We are going to change UUID, are your sure? [y/N]: y
ERROR: new fsid 5b66edf9-f8d8-489d-8ecf-fb601f42e79b is not the same with unfinished fsid change
ERROR: btrfstune failed
$