Sim Racing Kid, if you don't know already, as long as 1 user has paid the online fee on your PS4, you are able to create as many network ID's as you want and still have online access. I once thought i needed to pay per user on 1 PS4, but found out you can sign up with as many network ID's as you want, as long as 1 user on that PS4 has paid for online. Thought i'd throw this out just encase some didn't know this. But to your question, as
RaceDepartment has said, you just can't change it.