[keycloak-user] Update custom attribute in the account management console

Hi, I added a attribute to the users in my realm and I added the attribute to the management-console like described here: https://keycloak.gitbooks.io/server-developer-guide/content/topics/custom... So, now I can see the custom attribute, but I cannot update it. After changing and pressing save, the former value appears again. Do I need to change the "OnSave..."? (I´m using 1.9.8) Thanks, Uli