Moindearg must do it all again for a third time if they are to reach this year's junior football championship final.
Last weekend, they saw off Eire Og in the semi final replay on a scoreline of 1-11 to 0-08, but the game must be now replayed followed a technical mistake by match referee.
Moindearg's Darren McGowan was black carded during game and had received a yellow card earlier in the match, which means he can't be replaced.
However, the eventual winners brought on a sub to replace McGowan and the mistake was only highlighted after the game and a second replay has been ordered by the London board.
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