Strict Notice: Only variables should be passed by reference  in /var/www/vhosts/alphabez.de/httpdocs/lib/Zend/Db/Select.php on line 216

#0 /var/www/vhosts/alphabez.de/httpdocs/lib/Zend/Db/Select.php(216): mageCoreErrorHandler(2048, 'Only variables ...', '/var/www/vhosts...', 216, Array)
#1 /var/www/vhosts/alphabez.de/httpdocs/app/code/core/Mage/Eav/Model/Mysql4/Entity/Attribute/Collection.php(68): Zend_Db_Select->columns(Array)
#2 /var/www/vhosts/alphabez.de/httpdocs/app/code/core/Mage/Eav/Model/Config.php(605): Mage_Eav_Model_Mysql4_Entity_Attribute_Collection->useLoadDataFields()
#3 /var/www/vhosts/alphabez.de/httpdocs/app/code/core/Mage/Eav/Model/Entity/Collection/Abstract.php(367): Mage_Eav_Model_Config->loadCollectionAttributes('catalog_product', Array)
#4 /var/www/vhosts/alphabez.de/httpdocs/app/code/core/Mage/Catalog/Model/Resource/Eav/Mysql4/Product/Collection.php(303): Mage_Eav_Model_Entity_Collection_Abstract->addAttributeToSelect(Array, false)
#5 /var/www/vhosts/alphabez.de/httpdocs/app/code/core/Mage/Sales/Model/Mysql4/Quote/Item/Collection.php(140): Mage_Catalog_Model_Resource_Eav_Mysql4_Product_Collection->addAttributeToSelect(Array)
#6 /var/www/vhosts/alphabez.de/httpdocs/app/code/core/Mage/Sales/Model/Mysql4/Quote/Item/Collection.php(101): Mage_Sales_Model_Mysql4_Quote_Item_Collection->_assignProducts()
#7 /var/www/vhosts/alphabez.de/httpdocs/lib/Varien/Data/Collection/Db.php(659): Mage_Sales_Model_Mysql4_Quote_Item_Collection->_afterLoad()
#8 /var/www/vhosts/alphabez.de/httpdocs/app/code/core/Mage/Core/Model/Mysql4/Collection/Abstract.php(191): Varien_Data_Collection_Db->load(false, false)
#9 /var/www/vhosts/alphabez.de/httpdocs/lib/Varien/Data/Collection.php(669): Mage_Core_Model_Mysql4_Collection_Abstract->load()
#10 /var/www/vhosts/alphabez.de/httpdocs/app/code/core/Mage/Sales/Model/Quote.php(528): Varien_Data_Collection->getIterator()
#11 /var/www/vhosts/alphabez.de/httpdocs/app/code/core/Mage/Sales/Model/Quote.php(559): Mage_Sales_Model_Quote->getAllItems()
#12 /var/www/vhosts/alphabez.de/httpdocs/app/code/core/Mage/Checkout/controllers/OnepageController.php(124): Mage_Sales_Model_Quote->hasItems()
#13 /var/www/vhosts/alphabez.de/httpdocs/app/code/core/Mage/Core/Controller/Varien/Action.php(367): Mage_Checkout_OnepageController->indexAction()
#14 /var/www/vhosts/alphabez.de/httpdocs/app/code/core/Mage/Core/Controller/Varien/Router/Standard.php(247): Mage_Core_Controller_Varien_Action->dispatch('index')
#15 /var/www/vhosts/alphabez.de/httpdocs/app/code/core/Mage/Core/Controller/Varien/Front.php(158): Mage_Core_Controller_Varien_Router_Standard->match(Object(Mage_Core_Controller_Request_Http))
#16 /var/www/vhosts/alphabez.de/httpdocs/app/Mage.php(457): Mage_Core_Controller_Varien_Front->dispatch()
#17 /var/www/vhosts/alphabez.de/httpdocs/index.php(46): Mage::run()
#18 {main}