You can take access to a training back in a purchase. It is not needed for a manager to cancel an order — then orders statistics won’t be concerned. To do it you need to choose «Ignore the purchase when granting access to training for user» item and save changes. Important: this option influence only access to trainings. If product is set up for getting into a group or issuing of bonus money, then this item won’t take a user out of a group and cancel issuing of bonuses.