base playstle error

I had completed the new objective that had 99 depaul along with the 99 shooting,dribbling,physical and passing so i put those evos on my füllkrug evo. after that i put the base playstyle trivela on him because he had one base playstyle left. Once i clicked confirm on the evo i then checked on him after i clicked accept and backed out of evolutions and he had no trivela base.