Player career mode starting attributes

I just started a player career mode and my attributes are set and locked at 75, overall included. I've always boosted my attributes after a month/two months of good performances and starting at 75 ruins the realistic trait that my careers always had. Even the defensive attributes are set at 75 and for a right wing it's too high. I checked if that is just a rare bug but it's not. Does someone know how to avoid it?