what is code 524

what a Google search tells me, is the code 524.

means underage account. 

so it's probably best to Contact support, if you mean it's a mistake

https://help.ea.com/en/

or if you are on Twitter.
https://twitter.com/EAHelp.

or if you are on Facebook.
https://www.facebook.com/EAHelpHub

info on child accounts.

https://help.ea.com/en/help/account/online-access-for-child-accounts/

https://help.ea.com/en/help/account/set-up-child-ea-account/

https://help.ea.com/en/help/account/aging-up-an-origin-account-to-an-adult-account/