Hi. I think that was only half of the answer. I have had this problem too: of removing original templates; ie- debian-9, fedora-26.
The documentation; https://www.qubes-os.org/doc/remove-vm-manually/ is only viable via templates that are not "installed by (system/dom0)". The GUI gives the error "You cannot remove templates that were installed by (system/dom0)". The TTY gives that error plus many more, even when following the documentation above. I had to reinstall my entire system because I interrupted a backup restore and the restore gave me too many templates that were "installed by system": debian-9; debian-9-1; fedora-26; fedora-26-1 A small bug that should be noted: sometimes when deleting qubes, they still have a target.wants at boot. -- You received this message because you are subscribed to the Google Groups "qubes-users" group. To unsubscribe from this group and stop receiving emails from it, send an email to qubes-users+unsubscr...@googlegroups.com. To post to this group, send email to qubes-users@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/qubes-users/5a6cfb6e-eb9a-4e42-9da5-60d0bd695717%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.