If it's deleted does `update_version` actually find a version? I'd be inclined to try to fix this in `update_version` to check if the app is deleted and to not send a signal if so? IMO, a deleted app *shouldn't* have a `current_version` b/c `current_version` means there is a public version of the app.

(And sorry I didn't help earlier. I'm partial PTO and today was a busy family day and I was AFK the whole day)