Spike down in KLCI, KLK 'error' request for cancellation

If it is within the Business Rules, the the exchange has the perogative to 'cancel' the trades. However morally it should not be cancelled (the error trades). If this is the case parties with vested interests eg short futures, can use this tactic to mark down the cash index, improving their position and taking profits. Then the next day conveniently claiming cnacellatio of the trades due to 'error'. If you make the error, then you should wear it...