System roles - Main data fields

Hello,

I have the problem that I can't add new fields to the main data of "System Roles". Normally it's possible through the API Configuration:

I go under QER > Property Editor / Propertys that can be edited / System Roles and want to add there new fields.

These new fields are not shown in the web Portal. What is the Problem here or do I have to change the code? (We are on Version 9.2)