Well depends on what you want to do, I haven’t done any destructibles , so not sure if you could set this up in there, probably not, one simple way would be to just turn off collision on your character, but that’s not good.
If you still want to have a box bounce when the character collides with it you’d need to have a non destructible mesh for that with physics enabled, and only when the boomerang projectile would hit the box, then you would first get and save box location into a variable, then destroy the box, and spawn another destructible box in same position, and of course then apply the Damage so it explodes.
So first make a non Destructible physics box , that would be my suggestion, let me know …