Item (Mage_Catalog_Model_Category) with the same id "82" already exist

#0 /www/wwwroot/pxtoysrc.com/app/code/core/Mage/Eav/Model/Entity/Collection/Abstract.php(265): Varien_Data_Collection->addItem(Object(Mage_Catalog_Model_Category))
#1 /www/wwwroot/pxtoysrc.com/app/code/core/Mage/Eav/Model/Entity/Collection/Abstract.php(1056): Mage_Eav_Model_Entity_Collection_Abstract->addItem(Object(Mage_Catalog_Model_Category))
#2 /www/wwwroot/pxtoysrc.com/app/code/core/Mage/Eav/Model/Entity/Collection/Abstract.php(871): Mage_Eav_Model_Entity_Collection_Abstract->_loadEntities(false, false)
#3 /www/wwwroot/pxtoysrc.com/app/code/core/Mage/Catalog/Model/Resource/Category/Collection.php(225): Mage_Eav_Model_Entity_Collection_Abstract->load(false, false)
#4 /www/wwwroot/pxtoysrc.com/app/code/core/Mage/Catalog/Model/Resource/Category.php(625): Mage_Catalog_Model_Resource_Category_Collection->load()
#5 /www/wwwroot/pxtoysrc.com/app/code/core/Mage/Catalog/Model/Category.php(859): Mage_Catalog_Model_Resource_Category->getParentDesignCategory(Object(Mage_Catalog_Model_Category))
#6 /www/wwwroot/pxtoysrc.com/app/code/core/Mage/Catalog/Model/Design.php(349): Mage_Catalog_Model_Category->getParentDesignCategory(Object(Mage_Catalog_Model_Category))
#7 /www/wwwroot/pxtoysrc.com/app/code/core/Mage/Catalog/controllers/CategoryController.php(118): Mage_Catalog_Model_Design->getDesignSettings(Object(Mage_Catalog_Model_Category))
#8 /www/wwwroot/pxtoysrc.com/app/code/core/Mage/Core/Controller/Varien/Action.php(418): Mage_Catalog_CategoryController->viewAction()
#9 /www/wwwroot/pxtoysrc.com/app/code/core/Mage/Core/Controller/Varien/Router/Standard.php(254): Mage_Core_Controller_Varien_Action->dispatch('view')
#10 /www/wwwroot/pxtoysrc.com/app/code/core/Mage/Core/Controller/Varien/Front.php(172): Mage_Core_Controller_Varien_Router_Standard->match(Object(Mage_Core_Controller_Request_Http))
#11 /www/wwwroot/pxtoysrc.com/app/code/core/Mage/Core/Model/App.php(365): Mage_Core_Controller_Varien_Front->dispatch()
#12 /www/wwwroot/pxtoysrc.com/app/Mage.php(687): Mage_Core_Model_App->run(Array)
#13 /www/wwwroot/pxtoysrc.com/index.php(83): Mage::run('', 'store')
#14 {main}