So far I don't think so. I'm not sure of a real use case? I did however come up with the question awhile back moving along the lines of how clones might meet up, ie working on two disk, which are bare metal clones, on a single host, maybe even a clone, and having the host barf at mounting the same thing in multiple places under the same credential even though they are actually physically unique. Yep, I tried once, first one works and second one errors, flip order is the same result. So I don't try that... But it did raise the question! Using single partitions for play, vm to bare metal to vm, and easy to alter 'uniqueness' of the clones. So outside of this craziness I'm back to my first thought, no real use case? And I never found a way. I believe you can change a second group and not the one your on or in.