failed to create user, UI7 ?

I’m facing a problem when trying to setup my girlfriend as a basic user towards my vera.

I’m heading to “Users & Account info”-“Other Users”. I then enter a username for her, “her name” then I enter her email “” then a password. I choose basic user and i check which vera she should have access to. I only got one so…

After I hit add user I get this message: “Failed to create user! Username already exists. Please try another username”

I have never created a user before except my own when I first setup the vera and that is a completely different username/email. I can’t see any other user in my vera, what am I doing wrong or is there a ghost in my vera?