Motor6d that is not supposed to move body for some reason moves it

im currently developing a FPS Game and to display viewmodel animations on character i added 2nd viewmodel for server and binded arms to it, but when i try to move it using motor6d it also moves whole body

You can see the problem on player viewport inside of my custom inventory. When i run motors c0 changes to display that and it also moves body. that motor is selected in properties. part1 HRP is not players HRP but a Server vm one

this is a custom rig btw