Player shooting a npc wont damage it

I spawned my friend a zombie in game and gave him a fas gun and hes not able to do any damage with any gun at all towards the npcs why?

Zombies cannot use weapons. ( duh )

I think he is talking about his friend using the weapon against the zombie.

In that case the damage must be blocked by some addon then.

I meant i spawned a zombie for my friend to kill lmao, but im able to do damage, oh i think i know whats wrong, i probably made it so players cant damage entities or world models or w/e in q menu, i ll report back