Analog Stick Drift

So I am fixing a controller that has analog drift right now and I found out what is causing the problem. The gray clip that is on the left side of the potentiometer is loose. Thing is I dont know how to fix that. Is there a way to tighten up that gray clip on the side of the potentiometer or should I just remove it? Also if I remove it will it cause the analog stick to be lose in the future?