Invalid id or tag 'pagina_47 3425_20570' : must use only [a-zA-Z0-9_]

Arquivo /home1/alfacar/library/Zend/Cache.php, linha 209

Trace #0 /home1/alfacar/library/Zend/Cache/Core.php(679): Zend_Cache::throwException('Invalid id or t...') #1 /home1/alfacar/library/Zend/Cache/Core.php(303): Zend_Cache_Core::_validateIdOrTag('pagina_47 3425_...') #2 /home1/alfacar/application/controllers/IndexController.php(151): Zend_Cache_Core->load('pagina_47 3425_...') #3 /home1/alfacar/library/Zend/Controller/Action.php(516): IndexController->indexAction() #4 /home1/alfacar/library/Zend/Controller/Dispatcher/Standard.php(308): Zend_Controller_Action->dispatch('indexAction') #5 /home1/alfacar/library/Zend/Controller/Front.php(954): Zend_Controller_Dispatcher_Standard->dispatch(Object(Zend_Controller_Request_Http), Object(Zend_Controller_Response_Http)) #6 /home1/alfacar/library/Zend/Application/Bootstrap/Bootstrap.php(97): Zend_Controller_Front->dispatch() #7 /home1/alfacar/library/Zend/Application.php(366): Zend_Application_Bootstrap_Bootstrap->run() #8 /home1/alfacar/public_html/index.php(32): Zend_Application->run() #9 {main}