TOPIC: fatal error

Fatal error: Call to undefined method JFormFieldHotspotsLanguage::getAttribute() in C:\xampp\htdocs\xxx\administrator\components\com_hotspots\models\fields\hotspotslanguage.php on line 39

i get this error when i try to creat menu item what could be the problem..joomla 3.1.5

Just move to joomla 3.3 - joomla 3.1 is already outdated and not supported. Updating to 3.3 is just 1 click action

Cheers,
Daniel