I had built a version of this app, then deleted it and stated over.
When I try to add the first entry to my database, I’m getting this error:
OperationalError at /admin/shorts/overview/add/
no such table: main.auth_user__old
Take a look at the database chapter and re-read the part about migrations. Your database needs to match your app, so if you delete the app and start over, you also need to delete the database and start over there as well. :)