How to lock down environments completely

My question: Team members with viewer role can edit fields in the current value column of environments. I want to lock the whole file, but at the moment, it seems impossible. Is there a way I can achieve my objective?

NOTE: We have opted professional plan.

How I found the problem: I was trying to login using environment variables but request kept failing. Then, I found out that somebody had changed the current values and my request was taking the incorrect values.

I’ve already tried: