Help Unlearn Role trait

[Chan Fliflo]

Quick question, I want to buy this young player as he could fit really well into my tactic. I would train him first as a target man to get his physical stats high enough and then I would train en play him as an advanced forward. 

But as you can see he has this role trait 'Plays with back to the goal'. As a target man it is useful but not as an advanced forward. Is it somehow possible for him to unlearn this trait?

[Ashez]

Traits are basically based on stats and they change as the stats do, stupid I know as I've had the exact same issues before as you. Personally I don't think they do anything anyway.