by Dale Siggerfjell.
Interesting, I ran this and eventually got backups but unfortunately after truncating the three tables that you mentioned my "automatic backups" remained in the course restore space. The backups write to disk properly, just aren't updated in the table that houses this information and those links.
It's recently occurred to me that despite the backups taking place successfully, on the site it's only kept the 5 last courses before I changed my backup location settings. I can't manually remove them as the links are all dead, so it's a bit of a hassle to go through manually creating 0 bite files.
Not sure really how to address this yet.