How to block func_physbox?

In my map I have some func_physboxes but I don’t the player to be able to carry them into the next part of the map.

Is there a way to block the physboxes from going into the next part whilst still being able to let the player through?
Like a forcefield or something?

I’ve tried trigger_physics_trap but that seems to only work on props.

thank you so much, it worked

Edit: oh, by the way, how do i set the prefix of the thread as solved?