Как автоматически изменить статус заказа при смене статуса доставки?

$bxEventManager = \Bitrix\Main\EventManager::getInstance();

        $bxEventManager->addEventHandler(
            'sale',
            'OnSaleShipmentEntitySaved',
            array(
                "\\Gricuk\\Shipment",
                "onSaleShipmentSavedHandler"
            )
        );

<?php
namespace Gricuk;


use Bitrix\Main\Event;
use Bitrix\Main\EventResult;
use Bitrix\Main\Result;

class Shipment
{
    public static function onSaleShipmentSavedHandler(\Bitrix\Main\Event $event)
    {
        /** @var \Bitrix\Sale\Shipment $shipment */
        $shipment = $event->getParameter("ENTITY");
        $oldValues = $event->getParameter("VALUES");

        $shipmentFields = $shipment->getFieldValues();
        /**
         * Ключ - статус ДОСТАВКИ
         * Значение - статус ЗАКАЗА
         */
        $statusMap = [
            "DR" => "F",
            "DB" => "RS"
        ];
        if (isset($statusMap[$shipmentFields["STATUS_ID"]])) {
            try {
                $orderId = $shipment->getParentOrderId();
                $order = \Bitrix\Sale\Order::load($orderId);
                $order->setField("STATUS_ID", $statusMap[$shipmentFields["STATUS_ID"]]);

                /** @var Result $saveResult */
                $saveResult = $order->save();
                if (!$saveResult->isSuccess()) {
                    \Bitrix\Main\Diag\Debug::dumpToFile($saveResult, '$saveResult', 'onSaleShipmentSavedHandler.log');
                }
            } catch (\Exception $e) {
                \Bitrix\Main\Diag\Debug::dumpToFile($e, '$e', 'onSaleShipmentSavedHandler.log');
            }
        }
    }
}