So lets say in squadron combat, a Sloane TIE Fighter rolls an accuracy vs an enemy Ace with Scatter. You decide to spend the accuracy to spend the defender's scatter. In the RRG page 4 under Defense Tokens, "A defense token cannot be spent more then once during an attack". Does this mean that during this attack, that in the Defense Tokens step the defender cannot spend the Scatter due to it being 'spent' already?