diff --git a/vendor/magento/module-customer-custom-attributes/Model/ResourceModel/Sales/AbstractSales.php b/vendor/magento/module-customer-custom-attributes/Model/ResourceModel/Sales/AbstractSales.php
index e16042cd386..5033d96960b 100644
--- a/vendor/magento/module-customer-custom-attributes/Model/ResourceModel/Sales/AbstractSales.php
+++ b/vendor/magento/module-customer-custom-attributes/Model/ResourceModel/Sales/AbstractSales.php
@@ -103,6 +103,7 @@ abstract class AbstractSales extends \Magento\Framework\Model\ResourceModel\Db\A

     /**
      * Check if main entity exists in main table.
+     *
      * Need to prevent errors in case of multiple customer log in into one account.
      *
      * @param \Magento\CustomerCustomAttributes\Model\Sales\AbstractSales $sales
@@ -127,11 +128,9 @@ abstract class AbstractSales extends \Magento\Framework\Model\ResourceModel\Db\A
         $select = $this->getConnection()->select()->from(
             $parentTable,
             $parentIdField
-        )->forUpdate(
-            true
         )->where(
             "{$parentIdField} = ?",
-            $sales->getId()
+            (int) $sales->getId()
         );
         if ($this->getConnection()->fetchOne($select)) {
             return true;