Referee Keith Stroud has admitted he blundered by not allowing Newcastle to try again with a penalty that was disallowed for encroachment in the Magpies' 1-0 win over Burton.
Matt Ritchie had a penalty ruled out after half an hour in controversial circumstances that briefly threatened to derail the Magpies' push for the title.
Stroud awarded Burton an indirect free kick rather than ask for the spot kick to be retaken after Dwight Gayle dashed into the penalty area before it was taken.
Rules of the game indicated Newcastle should have been allowed a second chance from 12 yards, and referees' body Professional Game Match Officials Limited (PGMOL) confirmed Stroud had made an error.