Question Linux Gnome Disks finds ghost user??

[Brutal_Moose]

Linux Ubuntu > Gnome Disks > mount disk image .img read-only > mount partition in image > unmount partition in image > authentication required "loop15p1 mounted by another user"

I only have 1 normal user account, in addition to the administrator account. Unmounting partitions does not normally require authentication by to being mounted by another user. I have been using this for 10 years, and I have never seen that, now it always says that. Why does it require that now?

 

[Grobe]

Does it work if you use terminal to mount the image file ?