Teams that are not in the game basically.Question though. Which I have absolutely no idea about.
How do you know which leagues you need to have 'apply player and squad data' ticked/not ticked ?
If you have a team, but it doesnt have proper kits and its name is weird (like Chelsea B) - dont tick any boxes.
If you are adding a new team, or league - you have to Apply Player Data.
So Bundesliga, for example. There are 3 teams in the game - Bayern, Bayer and Schalke. They dont need boxes ticked. All others do, coz they aint in the game.