Ride The Lightning won't uninstall

Ride The Lightning broke when I moved to a new external drive (I believe I have everything else working though). In the Umbrel apps, it is stuck on Uninstalling;

from the apps cli, if I try to uninstall or install, I get the same error:

umbrel@umbrel:~/umbrel/scripts $ ./app uninstall ride-the-lightning
Removing images for app ride-the-lightning…
ERROR: readlink /var/lib/docker/overlay2/l/B7T7YMKSUBAU2K6DBZTWB5KHPV: no such file or directory

Cool, so busted link. How can I get past this and get my RTL back? reboot doesn’t help.

So, no, symlink isn’t there; recreating it wouldn’t work too well, as it would point to …/[some hash value]/diff or something similar, and I have no idea what that hash value would be, or if it even exists.