Fatal error: Uncaught exception 'Zend_Cache_Exception' with message 'Invalid id or tag 'news_-1' : must use only [a-zA-Z0-9_]' in /usr/share/zendframework-1.8.1/Zend/Cache.php:208
Stack trace:
#0 /usr/share/zendframework-1.8.1/Zend/Cache/Core.php(557): Zend_Cache::throwException('Invalid id or t...')
#1 /usr/share/zendframework-1.8.1/Zend/Cache/Core.php(295): Zend_Cache_Core::_validateIdOrTag('news_-1')
#2 /home/sites/site1/web/app/modules/default/controllers/NewsController.php(18): Zend_Cache_Core->test('news_-1')
#3 /usr/share/zendframework-1.8.1/Zend/Controller/Action.php(512): NewsController->displayAction()
#4 /usr/share/zendframework-1.8.1/Zend/Controller/Dispatcher/Standard.php(288): Zend_Controller_Action->dispatch('displayAction')
#5 /usr/share/zendframework-1.8.1/Zend/Controller/Front.php(936): Zend_Controller_Dispatcher_Standard->dispatch(Object(Zend_Controller_Request_Http), Object(Zend_Controller_Response_Http))
#6 /home/sites/site1/web/index.php(85): Zend_Controller_Front->dispatch()
#7 {main}
thrown in /usr/share/zendframework-1.8.1/Zend/Cache.php on line 208