我客户的Magento商店正在运行1.9.1.1。版本。
似乎有些产品无法添加到购物车，并带有简单的返回消息“无法将产品添加到购物车”。可能会添加旧产品，而不是最近添加的产品。
exception.log中出现此错误：
Next exception 'Zend_Db_Statement_Exception' with message 'SQLSTATE[23000]: Integrity constraint violation: 1452 Cannot add or update a child row: a foreign key constraint fails (`htf_magento`.`sales_flat_quote_item`, CONSTRAINT `FK_SALES_FLAT_QUOTE_ITEM_PRD_ID_CAT_PRD_ENTT_ENTT_ID` FOREIGN KEY (`product_id`) REFERENCES `catalog_product_entity_OLD` (`entity_id`) ON DEL), query was: INSERT INTO `sales_flat_quote_item` (`quote_id`, `created_at`, `updated_at`, `product_id`, `store_id`, `is_virtual`, `sku`, `name`, `applied_rule_ids`, `free_shipping`, `is_qty_decimal`, `weight`, `qty`, `price`, `base_price`, `discount_percent`, `discount_amount`, `base_discount_amount`, `tax_percent`, `tax_amount`, `base_tax_amount`, `row_total`, `base_row_total`, `row_weight`, `product_type`, `base_cost`, `price_incl_tax`, `base_price_incl_tax`, `row_total_incl_tax`, `base_row_total_incl_tax`, `hidden_tax_amount`, `base_hidden_tax_amount`, `weee_tax_disposition`, `weee_tax_row_disposition`, `base_weee_tax_disposition`, `base_weee_tax_row_disposition`, `weee_tax_applied`, `weee_tax_applied_amount`, `weee_tax_applied_row_amount`, `base_weee_tax_applied_amount`) VALUES (?, '2018-07-23 13:09:08', '2018-07-23 13:09:08', ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)' in /home/htf/www/lib/Zend/Db/Statement/Pdo.php:235
Stack trace:
#0 /home/htf/www/lib/Varien/Db/Statement/Pdo/Mysql.php(110): Zend_Db_Statement_Pdo->_execute(Array)
#1 /home/htf/www/app/code/core/Zend/Db/Statement.php(291): Varien_Db_Statement_Pdo_Mysql->_execute(Array)
#2 /home/htf/www/lib/Zend/Db/Adapter/Abstract.php(480): Zend_Db_Statement->execute(Array)
#3 /home/htf/www/lib/Zend/Db/Adapter/Pdo/Abstract.php(238): Zend_Db_Adapter_Abstract->query('INSERT INTO `sa...', Array)
#4 /home/htf/www/lib/Varien/Db/Adapter/Pdo/Mysql.php(428): Zend_Db_Adapter_Pdo_Abstract->query('INSERT INTO `sa...', Array)
#5 /home/htf/www/lib/Zend/Db/Adapter/Abstract.php(576): Varien_Db_Adapter_Pdo_Mysql->query('INSERT INTO `sa...', Array)
#6 /home/htf/www/app/code/core/Mage/Core/Model/Resource/Db/Abstract.php(453): Zend_Db_Adapter_Abstract->insert('sales_flat_quot...', Array)
#7 /home/htf/www/app/code/core/Mage/Core/Model/Abstract.php(318): Mage_Core_Model_Resource_Db_Abstract->save(Object(Mage_Sales_Model_Quote_Item))
#8 /home/htf/www/app/code/core/Mage/Sales/Model/Quote/Item.php(749): Mage_Core_Model_Abstract->save()
#9 /home/htf/www/app/code/core/Mage/Core/Model/Resource/Db/Collection/Abstract.php(652): Mage_Sales_Model_Quote_Item->save()
#10 /home/htf/www/app/code/core/Mage/Sales/Model/Quote.php(340): Mage_Core_Model_Resource_Db_Collection_Abstract->save()
#11 /home/htf/www/app/code/core/Mage/Core/Model/Abstract.php(319): Mage_Sales_Model_Quote->_afterSave()
#12 /home/htf/www/app/code/core/Mage/Sales/Model/Quote.php(1966): Mage_Core_Model_Abstract->save()
#13 /home/htf/www/app/code/core/Mage/Checkout/Model/Cart.php(459): Mage_Sales_Model_Quote->save()
#14 /home/htf/www/app/code/core/Mage/Checkout/controllers/CartController.php(223): Mage_Checkout_Model_Cart->save()
#15 /home/htf/www/app/code/core/Mage/Core/Controller/Varien/Action.php(418): Mage_Checkout_CartController->addAction()
#16 /home/htf/www/app/code/core/Mage/Core/Controller/Varien/Router/Standard.php(254): Mage_Core_Controller_Varien_Action->dispatch('add')
#17 /home/htf/www/app/code/core/Mage/Core/Controller/Varien/Front.php(172): Mage_Core_Controller_Varien_Router_Standard->match(Object(Mage_Core_Controller_Request_Http))
#18 /home/htf/www/app/code/core/Mage/Core/Model/App.php(354): Mage_Core_Controller_Varien_Front->dispatch()
#19 /home/htf/www/app/Mage.php(684): Mage_Core_Model_App->run(Array)
#20 /home/htf/www/index.php(105): Mage::run('', 'store')
#21 {main}
有人会对问题的根源有任何了解吗？