Circular requests abundant

I am getting so many of these and don’t know what they mean - I suspect it’s a DNS issue (duh) that is resolving back and forth between my DC and Adam. But I don’t know how to fix. The DC’s DNS is and there is no entry in Adam to point DNS to my DC.

From my log:
5:19:39 PM WALT-DC System - Circular Request

I do have a rule in Adam or AD: is my DC