I cant play madden on my main account because of a second account linked to ea

I've always had 2 psn accounts linked to my ea account 1 is mine the other is my brother but it happened on accident and I never knew how to fix it so i jus left it, but now for some reason a couple days ago I haven't been able to play no game mode besides offline play now, I keep getting this error and for some reason it never says I have friends on and when I click on the friends tab to invite anybody it says the other accounts name in the top right and I'm unable to unlink it for some reason.