Update on the comment above. No, changing Attrition to ''1'' did not help. For some reason, the attributes are changed again.
These are Graf's skills when I start the new game:
These skills are the ones I had before:
There is a huge difference in Physical Skills and a slight difference in other skills. This happens to other players as well. I have no idea what is going on.
Or maybe it is related to Attrition, but because I have to first go to ''Resume Current Game'' in World Tour to be able to Start a new game, maybe the game re-loads previous Attrition value from the ''Resume Current Game'' settings. I changed the Attrition value in the Tennis.ini file only after I figured out how to start a new game without the game crashing. But I checked the Tennis.ini file and the value is still set to ''1'' when I exit the game. But then I don't understand how I got the skills that one time to be as I set them up lol.