I suspect that what you're seeing is a mis-match in the labels. Both GPT and most filesystems support disk labels, but there's no mechanism to keep them synchronized. You can try changing the disk labels in gdisk or cgdisk and see if the problem disappears.
I suspect that what you're seeing is a mis-match in the labels. Both GPT and most filesystems support disk labels, but there's no mechanism to keep them synchronized. You can try changing the disk labels in gdisk or cgdisk and see if the problem disappears.