Incorrect item key "agent.ping" provided for trigger expression on "DONTEXIST". [trigger_prototypes.php:161 ? CAPIObject->update() ? CAPIObject->__call() ? czbxrpc::call() ? czbxrpc::callAPI() ? call_user_func() ? CTriggerPrototype->update() ? getExpressionItems() in C:\xampp\htdocs\ZBX-6613\frontends\php\api\classes\CTriggerPrototype.php:614]

Host "DONTEXIST" - don't exist