In the US there are no consequences for people in power failing to follow procedures, laws or regulations - except for being told to stop doing whatever illegal thing they're doing, and possibly getting sued way down the line, which gets paid by taxpayers.
From reading more into the case, it seems the issue may be related to how her lawyer handled the case.
They probably did “identity challenge” arguing that she is not the right person. But from Tennessee’s perspective, she was considered the correct person to be arrested, so there was no “mistaken identity” in their system. In other words, North Dakota Wanted person x and here is person x.
Once a judge in North Dakota reviewed the full evidence (and found that person they issued warrant for arrest is not one they want), the case was dismissed.