I created a party for my friends and I, but some randoms joined it and I wanna kick'em.
To let my friends join the game, i let some openseats, but my friends didn't join fast engouh.

The game hasn't stared, we're still in the lobby. But when I try to kick someone a popup says :
You cannot remove a player who has accepted the game

Is there any way to kick these players, or do I have to start an other game and pay attention to the settings ?

You can't remove players that accepted the game, so you must make a new game and delete the old one.

If you can keep the game out of the open games, then do that, make all the slots for friends you invited.

thx guys