Help with climbing on players

I have a PvP game, and i want to players not being allowed to climb on other players by getting close to them, what can i do to that not happen but that players still can climb on objects?

You can make a collision group for players that allow them to collide with everything but other players.

Nono, players can collide but they cant climb on eachother

Like what @jelliedbaboy said, a collision group would be excellent for this but, if you don’t want to do that. You could make player collide inner rather than outer or you could make some sort of hitbox that keeps the player away from a player.