Solved Replacing instead of adding.

Hello!
So i've been doing a addon that makes the farmhand flatbed from the D-Series usable on the H-Series (Ofc extended) but i realised that the standard frame doesn't have the upfit slot, so i did copy the standard jbeam and added the upfit slot, but instead of adding a new frame it overrides the original one. I changed the name and file name is different (van_frame_upfit.jbeam) and it still overrides also I attached the code from the jbeam.
It's in 0.24/vehicles/van folder

 

Just change this to something else:

 

Thanks mate, it works now.