This sounds like there's a functionality that depends on usernames having "user" in their name. Maybe there's no trivial way of distinguishing between what the

This sounds like there's a functionality that depends on usernames having "user" in their name. Maybe there's no trivial way of distinguishing between what the system is looking for and a "legitimate" user and fixing that would require a change to the user accounts model. I'm purely speculating here but I've seen my fair share of seemingly simple-to-fix bugs requiring huge changes.