Registration of users created by an external application

Hi, I create users via an external application connected to the gibbonPerson database table, it happens that when I go to register the users to the specific application I get “STAFF” instead of “Student”, as in the attached photo. How can I edit and get the right text out? In another test installation I get “Parent” instead. I need the student to come out in order to register them.
Thank you.

Please, has anyone ever encountered this problem?