Ps4 score problem?

I sold Assassin's creed black flag two years ago. The score (30%) has been preserved in system memory. I thought so fortunately I have not deleted that when I saw the offer yesterday in the store and downloaded it again. Wrong thought! If I start the game this score is not in it or can only start new game. But the other 2% booth, which is also from 2 years ago, is still here! Can someone help me there?

Yes, because it is not the same game