What does the "sm forget" command do?

What does the forget subcommand of the sm command do? For reference, here's the help output for sm: usage: sm list-disks [adoptable] sm list-volumes [public|private|emulated|stub|all] sm has-adoptable sm get-primary-storage-uuid sm set-force-adoptable [on|off|default] sm set-virtual-disk [true|false] sm partition DISK [public|private|mixed] [ratio] sm mount VOLUME sm unmount VOLUME sm format VOLUME sm benchmark VOLUME sm idle-maint [run|abort] sm fstrim sm forget [UUID|all] sm set-emulate-fbe [true|false] sm start-checkpoint sm supports-checkpoint sm unmount-app-data-dirs PACKAGE_NAME PID USER_ID