// handle clash with already staged entries
case LeftTuple.INSERT :
leftTuples.removeInsert( childLeftTuple );
break;
case LeftTuple.UPDATE :
leftTuples.removeUpdate( childLeftTuple );
break;
}
leftTuples.addDelete( childLeftTuple );
childLeftTuple.unlinkFromRightParent();
childLeftTuple.unlinkFromLeftParent();