ACP2E-4157: Error when create credit memo for offline refund

Author: soklymeach

app/code/Magento/Sales/Controller/Adminhtml/Order/Creditmemo/Save.php

@@ -12,6 +12,7 @@
 use Magento\Sales\Model\Order\Email\Sender\CreditmemoSender;
 use Magento\Catalog\Model\Product\Type\AbstractType;
 use Magento\Sales\Model\Order\Creditmemo\Item;
+use Magento\Catalog\Model\Product\Type;
 
 /**
  * @SuppressWarnings(PHPMD.CouplingBetweenObjects)
@@ -181,19 +182,19 @@ private function adjustCreditMemoItemQuantities(Creditmemo $creditMemo): void
     }
 
     /**
-     * Check if quantity accumulation should be skipped for bundle products with fixed pricing
+     * Check if the quantity adjustment should be skipped
      *
      * @param Item $item
      * @return bool
      */
     private function shouldSkipQuantityAccumulation(Item $item): bool
     {
         $parentOrderItem = $item->getOrderItem()->getParentItem();
-        if (!$parentOrderItem || $parentOrderItem->getProductType() !== 'bundle') {
+        if (!$parentOrderItem || $parentOrderItem->getProductType() !== Type::TYPE_BUNDLE) {
             return false;
         }
         $parentOptions = $parentOrderItem->getProductOptions();
         return isset($parentOptions['product_calculations']) &&
-            $parentOptions['product_calculations'] == AbstractType::CALCULATE_PARENT;
+            $parentOptions['product_calculations'] === AbstractType::CALCULATE_PARENT;
     }
 }