Reset purchase request does not reset stock move to staging
For a sale line is on supply, the stock moves are created in staging state to avoid the Stock Supply Module to create another purchase request. When the purchase request is cancelled, the stock moves are set to draft so the Stock Supply Module will create if needed a purchase request. But if the purchase request in exception is reset to be purchased again, the stock moves are still in draft state so the Stock Supply Module may create a second purchase request.