SQLSTATE[HY000]: General error: 1267 Illegal mix of collations (latin1_swedish_ci,IMPLICIT) and (utf8_general_ci,COERCIBLE) for operation '='

#0 /var/www/vhosts/autonoleggio.it/httpdocs/library/Zend/Db/Statement.php(300): Zend_Db_Statement_Pdo->_execute(Array)
#1 /var/www/vhosts/autonoleggio.it/httpdocs/library/Zend/Db/Adapter/Abstract.php(468): Zend_Db_Statement->execute(Array)
#2 /var/www/vhosts/autonoleggio.it/httpdocs/library/Zend/Db/Adapter/Pdo/Abstract.php(238): Zend_Db_Adapter_Abstract->query(Object(Zend_Db_Table_Select), Array)
#3 /var/www/vhosts/autonoleggio.it/httpdocs/library/Zend/Db/Table/Abstract.php(1505): Zend_Db_Adapter_Pdo_Abstract->query(Object(Zend_Db_Table_Select))
#4 /var/www/vhosts/autonoleggio.it/httpdocs/library/Zend/Db/Table/Abstract.php(1367): Zend_Db_Table_Abstract->_fetch(Object(Zend_Db_Table_Select))
#5 /var/www/vhosts/autonoleggio.it/httpdocs/application/admin/models/CategorieNews.php(109): Zend_Db_Table_Abstract->fetchRow(Object(Zend_Db_Table_Select))
#6 /var/www/vhosts/autonoleggio.it/httpdocs/application/default/controllers/NewsController.php(39): CategorieNews->exist('brainstorming,-...')
#7 /var/www/vhosts/autonoleggio.it/httpdocs/library/Zend/Controller/Action.php(513): NewsController->listAction()
#8 /var/www/vhosts/autonoleggio.it/httpdocs/library/Zend/Controller/Dispatcher/Standard.php(295): Zend_Controller_Action->dispatch('listAction')
#9 /var/www/vhosts/autonoleggio.it/httpdocs/library/Zend/Controller/Front.php(954): Zend_Controller_Dispatcher_Standard->dispatch(Object(Zend_Controller_Request_Http), Object(Zend_Controller_Response_Http))
#10 /var/www/vhosts/autonoleggio.it/httpdocs/application/bootstrap.php(1693): Zend_Controller_Front->dispatch()
#11 /var/www/vhosts/autonoleggio.it/httpdocs/index.php(2): require('/var/www/vhosts...')
#12 {main}