Getting rid of player trait

Hi everyone !

Quick question : I have an almost perfect regen striker, whose only flaw is that he has the “Comes deep to get ball” trait, when I would prefer him to try to beat the offside trap to benefit from his outstanding speed and off the ball stats. Of course, these two traits are mutually exclusive, so I tried several times now to unlearn it, using different coaches, without success. Each time, the coaches would tell me beforehand that it had a low chance of success.

Will I ever be able to get rid of it, or is it a lost cause ?

The only way you can get rid of it is to unlearn it, so if that isn't working, I believe it's a lost cause :-/