Invisible Moller PP & inventory resetting

Currently playing on the Xbox One X and I picked up what I believe is a 3 crown Moller PP some time ago.

Unfortunately the game still thinks I have it in my inventory and I cannot get rid of it.

One of the reasons I’m writing this now is because I think this gun is also the reason my inventory keeps resetting - I play the game in multiplayer with my Dad and he’s just picked up a 3 crown Moller PP, and his inventory has just rearranged itself.

Is there any way I can get rid of this gun?

The rearrange is a bit annoying but I guess it’s the developers taking a safe path in the process of making room in the inventory. If you don’t have several slots free beside each other they need to make at least two adjacent squares free so they rearrange everything.

It’s mostly about the Moller PP still showing as being in my inventory and that being a possible culprit for my inventory being rearranged, I’ve often got a few slots spare that are all adjacent anyway, in case I find guns