diff --git a/vendor/magento/module-multicoupon/Model/ResourceModel/Quote/AddCoupons.php b/vendor/magento/module-multicoupon/Model/ResourceModel/Quote/AddCoupons.php
index ff43e0621c4d..e0377bff7250 100644
--- a/vendor/magento/module-multicoupon/Model/ResourceModel/Quote/AddCoupons.php
+++ b/vendor/magento/module-multicoupon/Model/ResourceModel/Quote/AddCoupons.php
@@ -49,10 +49,13 @@ public function execute(string $cartId, array $couponCodes): void
             ];
         }
         $connection = $this->resourceConnection->getConnection();
+        $tableName = $this->resourceConnection->getTableName(self::MAIN_TABLE);
 
-        $connection->insertMultiple(
-            $this->resourceConnection->getTableName(self::MAIN_TABLE),
-            $rows
+        // Use insertOnDuplicate to avoid Duplicate Entry Errors in concurrent requests
+        $connection->insertOnDuplicate(
+            $tableName,
+            $rows,
+            [self::QUOTE_ID, self::COUPON_CODE]
         );
     }
 }