Need help with a insert problem

[ccarguy]

Hopefully someone here has run into this before and can give me some ideas. I have a 16750 GMT Master with 2 inserts black and a pepsi, when I change them the black insert goes in just fine the pepsi also goes in very easy, the issue I'm having is the pepsi insert after installed spins freely inside the bezel ring. Is there something that needs to be put on the underside of the insert to stop this?

Thanks for any help