NPCs not dieing from vermilion 2

Hello! On my private server with friends me and my friend does roleplay on it and we use the map OMGCITY and when he spawns in a npc and he uses a m9k machine gun. and then he shoots it non stop without reloading and i even tryed to shoot (i have owner my friend has admin) and they will not just die! how do i fix this?

here is the video proof

BUMP

no one helped me since 2 weeks…:blaze: