If I have two users with a long name, e.g. "Katarzyna Nowak" and "Katarzyna Kowalska", the system prompts the user ID "KATARZYN"
While this is ok when creating the first user, with the second one this name cannot be used and the system does not inform about it, but changes the user ID to a random string of characters. System should in such a case prevent the creation of such a user and inform the administrator that such a user ID already exists.