There is no active transaction

#0 /data/home/wwwroot/default/it/lib/Zend/Db/Adapter/Pdo/Abstract.php(322): PDO->rollBack()
#1 /data/home/wwwroot/default/it/lib/Zend/Db/Adapter/Abstract.php(524): Zend_Db_Adapter_Pdo_Abstract->_rollBack()
#2 /data/home/wwwroot/default/it/lib/Varien/Db/Adapter/Pdo/Mysql.php(266): Zend_Db_Adapter_Abstract->rollBack()
#3 /data/home/wwwroot/default/it/app/code/core/Mage/Core/Model/Resource/Abstract.php(124): Varien_Db_Adapter_Pdo_Mysql->rollback()
#4 /data/home/wwwroot/default/it/app/code/core/Mage/Core/Model/Abstract.php(326): Mage_Core_Model_Resource_Abstract->rollBack()
#5 /data/home/wwwroot/default/it/app/code/core/Mage/Catalog/Model/Product/Compare/Item.php(110): Mage_Core_Model_Abstract->save()
#6 /data/home/wwwroot/default/it/app/code/core/Mage/Catalog/Model/Product/Compare/List.php(51): Mage_Catalog_Model_Product_Compare_Item->save()
#7 /data/home/wwwroot/default/it/app/code/core/Mage/Catalog/Model/Product/Compare/List.php(67): Mage_Catalog_Model_Product_Compare_List->addProduct('2148')
#8 /data/home/wwwroot/default/it/app/code/local/Aosom/Compare/controllers/IndexController.php(44): Mage_Catalog_Model_Product_Compare_List->addProducts(Array)
#9 /data/home/wwwroot/default/it/app/code/core/Mage/Core/Controller/Varien/Action.php(418): Aosom_Compare_IndexController->indexAction()
#10 /data/home/wwwroot/default/it/app/code/local/Aosom/Compare/Controller/Router.php(66): Mage_Core_Controller_Varien_Action->dispatch('index')
#11 /data/home/wwwroot/default/it/app/code/core/Mage/Core/Controller/Varien/Front.php(172): Aosom_Compare_Controller_Router->match(Object(Mage_Core_Controller_Request_Http))
#12 /data/home/wwwroot/default/it/app/code/core/Mage/Core/Model/App.php(365): Mage_Core_Controller_Varien_Front->dispatch()
#13 /data/home/wwwroot/default/it/app/Mage.php(684): Mage_Core_Model_App->run(Array)
#14 /data/home/wwwroot/default/it/index.php(84): Mage::run('', 'store')
#15 {main}

Fatal error: Uncaught exception 'Exception' with message 'User Error: Some transactions have not been committed or rolled back in /data/home/wwwroot/default/it/lib/Varien/Db/Adapter/Pdo/Mysql.php on line 4039' in /data/home/wwwroot/default/it/app/code/core/Mage/Core/functions.php:245 Stack trace: #0 [internal function]: mageCoreErrorHandler(256, 'Some transactio...', '/data/home/wwwr...', 4039, Array) #1 /data/home/wwwroot/default/it/lib/Varien/Db/Adapter/Pdo/Mysql.php(4039): trigger_error('Some transactio...', 256) #2 [internal function]: Varien_Db_Adapter_Pdo_Mysql->__destruct() #3 {main} thrown in /data/home/wwwroot/default/it/app/code/core/Mage/Core/functions.php on line 245