Thank you very much @Mr.Loki but that is the problem. A lot of players are walking with Z and i need to tell every single player to change his key from settings. Also new players are asking me how to fix it ect. I just need to change the standard key for the whole server.
What you told about the unbind and bind is working, but it's only working for me. How can I unbind the key for the whole server?
EDIT:
unbindKey("z", "down", "voiceptt", "1") for example is not working because unbindKey can only remove bindKey's