Hi, I got a lot of this error message in recent.
Could you let me know how to solve it?
2017-04-13T03:45:02+00:00 ERR (3):
exception 'PDOException' with message 'SQLSTATE[23000]: Integrity constraint violation: 1452 Cannot add or update a child row: a foreign key constraint fails (`magento`.`yavva_alsoviewed_relation`, CONSTRAINT `FK_YAVVA_ALSOVIEWED_RELATION_RELATED_PRD_ID_CAT_PRD_ENTT_ENTT_ID` FOREIGN KEY (`related_product_id`) REFERENCES `catalog_product_entity` (`en)' in /usr/share/nginx/html/lib/Zend/Db/Statement/Pdo.php:228
Stack trace:
#0 /usr/share/nginx/html/lib/Zend/Db/Statement/Pdo.php(228): PDOStatement->execute(Array)
#1 /usr/share/nginx/html/lib/Varien/Db/Statement/Pdo/Mysql.php(110): Zend_Db_Statement_Pdo->_execute(Array)
#2 /usr/share/nginx/html/app/code/core/Zend/Db/Statement.php(291): Varien_Db_Statement_Pdo_Mysql->_execute(Array)
#3 /usr/share/nginx/html/lib/Zend/Db/Adapter/Abstract.php(480): Zend_Db_Statement->execute(Array)
#4 /usr/share/nginx/html/lib/Zend/Db/Adapter/Pdo/Abstract.php(238): Zend_Db_Adapter_Abstract->query('INSERT INTO `ya...', Array)
#5 /usr/share/nginx/html/lib/Varien/Db/Adapter/Pdo/Mysql.php(504): Zend_Db_Adapter_Pdo_Abstract->query('INSERT INTO `ya...', Array)
#6 /usr/share/nginx/html/lib/Varien/Db/Adapter/Pdo/Mysql.php(2036): Varien_Db_Adapter_Pdo_Mysql->query('INSERT INTO `ya...', Array)
#7 /usr/share/nginx/html/app/code/community/Yavva/Alsoviewed/Model/Resource/Relation.php(43): Varien_Db_Adapter_Pdo_Mysql->insertOnDuplicate('yavva_alsoviewe...', Array, Array)
#8 /usr/share/nginx/html/app/code/community/Yavva/Alsoviewed/Model/Observer.php(52): Yavva_Alsoviewed_Model_Resource_Relation->updateRelations(Array)
#9 [internal function]: Yavva_Alsoviewed_Model_Observer->processLog(Object(Mage_Cron_Model_Schedule))
#10 /usr/share/nginx/html/app/code/core/Mage/Cron/Model/Observer.php(326): call_user_func_array(Array, Array)
#11 /usr/share/nginx/html/app/code/core/Mage/Cron/Model/Observer.php(72): Mage_Cron_Model_Observer->_processJob(Object(Mage_Cron_Model_Schedule), Object(Mage_Core_Model_Config_Element))
#12 /usr/share/nginx/html/app/code/core/Mage/Core/Model/App.php(1358): Mage_Cron_Model_Observer->dispatch(Object(Varien_Event_Observer))
#13 /usr/share/nginx/html/app/code/core/Mage/Core/Model/App.php(1337): Mage_Core_Model_App->_callObserverMethod(Object(Mage_Cron_Model_Observer), 'dispatch', Object(Varien_Event_Observer))
#14 /usr/share/nginx/html/app/Mage.php(448): Mage_Core_Model_App->dispatchEvent('default', Array)
#15 /usr/share/nginx/html/cron.php(78): Mage::dispatchEvent('default')
#16 {main}
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 (`magento`.`yavva_alsoviewed_relation`, CONSTRAINT `FK_YAVVA_ALSOVIEWED_RELATION_RELATED_PRD_ID_CAT_PRD_ENTT_ENTT_ID` FOREIGN KEY (`related_product_id`) REFERENCES `catalog_product_entity` (`en), query was: INSERT INTO `yavva_alsoviewed_relation` (`product_id`,`related_product_id`,`weight`) VALUES (?, ?, ?), (?, ?, ?), (?, ?, ?), (?, ?, ?), (?, ?, ?), (?, ?, ?), (?, ?, ?), (?, ?, ?), (?, ?, ?), (?, ?, ?), (?, ?, ?), (?, ?, ?), (?, ?, ?), (?, ?, ?) ON DUPLICATE KEY UPDATE `weight` = weight + VALUES(weight)' in /usr/share/nginx/html/lib/Zend/Db/Statement/Pdo.php:235
Stack trace:
#0 /usr/share/nginx/html/lib/Varien/Db/Statement/Pdo/Mysql.php(110): Zend_Db_Statement_Pdo->_execute(Array)
#1 /usr/share/nginx/html/app/code/core/Zend/Db/Statement.php(291): Varien_Db_Statement_Pdo_Mysql->_execute(Array)
#2 /usr/share/nginx/html/lib/Zend/Db/Adapter/Abstract.php(480): Zend_Db_Statement->execute(Array)
#3 /usr/share/nginx/html/lib/Zend/Db/Adapter/Pdo/Abstract.php(238): Zend_Db_Adapter_Abstract->query('INSERT INTO `ya...', Array)
#4 /usr/share/nginx/html/lib/Varien/Db/Adapter/Pdo/Mysql.php(504): Zend_Db_Adapter_Pdo_Abstract->query('INSERT INTO `ya...', Array)
#5 /usr/share/nginx/html/lib/Varien/Db/Adapter/Pdo/Mysql.php(2036): Varien_Db_Adapter_Pdo_Mysql->query('INSERT INTO `ya...', Array)
#6 /usr/share/nginx/html/app/code/community/Yavva/Alsoviewed/Model/Resource/Relation.php(43): Varien_Db_Adapter_Pdo_Mysql->insertOnDuplicate('yavva_alsoviewe...', Array, Array)
#7 /usr/share/nginx/html/app/code/community/Yavva/Alsoviewed/Model/Observer.php(52): Yavva_Alsoviewed_Model_Resource_Relation->updateRelations(Array)
#8 [internal function]: Yavva_Alsoviewed_Model_Observer->processLog(Object(Mage_Cron_Model_Schedule))
#9 /usr/share/nginx/html/app/code/core/Mage/Cron/Model/Observer.php(326): call_user_func_array(Array, Array)
#10 /usr/share/nginx/html/app/code/core/Mage/Cron/Model/Observer.php(72): Mage_Cron_Model_Observer->_processJob(Object(Mage_Cron_Model_Schedule), Object(Mage_Core_Model_Config_Element))
#11 /usr/share/nginx/html/app/code/core/Mage/Core/Model/App.php(1358): Mage_Cron_Model_Observer->dispatch(Object(Varien_Event_Observer))
#12 /usr/share/nginx/html/app/code/core/Mage/Core/Model/App.php(1337): Mage_Core_Model_App->_callObserverMethod(Object(Mage_Cron_Model_Observer), 'dispatch', Object(Varien_Event_Observer))
#13 /usr/share/nginx/html/app/Mage.php(448): Mage_Core_Model_App->dispatchEvent('default', Array)
#14 /usr/share/nginx/html/cron.php(78): Mage::dispatchEvent('default')
#15 {main}