Deep German Hangs and neck (traps?) pain

I'm trying to learn/progress on shoulder inlocation on rings. Mostly because it looks awesome. In order to do that I'm doing deep german hangs on rings, each one for about 30 seconds. While Im trying to relax my shoulders and pecs, it seems that my neck, especially on the left side is really trying to contract, so sometimes it hurts my neck for a while.

Is this normal? Should I try to relax more?