Shared props and constraints, 2 DIFFERENT steam IDs. and i have prop protection.

I am trying to lan with my Friend, but I can undo his props, and move them around. Its stupid. the way we work around this is to go to the utilities and then undo. but who has time for that, I WANNA PRESS Z.

I have googled this problem, and whenever someone figgures it out, they don’t say how on the thread.
Please. Put me out of my missery. I only see him every once in a year, and need this fixed quickly.