In what would normally be a rather mundane vacatur order, a panel of judges got into a back-and-forth over the unanimous decision on Wednesday to vacate a previous split ruling that found a federal ban on handgun sales to people under 21 is unconstitutional.

The three-judge panel on the U.S. Court of Appeals for the Fourth Circuit, which included Judges George Steven Agee, Julius N. Richardson and James Wynn, agreed that a case challenging a law setting a minimum age requirement of 21 for handguns purchased from licensed dealers is now moot, and thus the court’s divided opinion on the matter from July should be vacated.