Item (Mage_Catalog_Model_Product) with the same id "11114" already exist

#0 /var/www/html/app/code/core/Mage/Eav/Model/Entity/Collection/Abstract.php(237): Varien_Data_Collection->addItem(Object(Mage_Catalog_Model_Product))
#1 /var/www/html/app/code/core/Mage/Eav/Model/Entity/Collection/Abstract.php(944): Mage_Eav_Model_Entity_Collection_Abstract->addItem(Object(Mage_Catalog_Model_Product))
#2 /var/www/html/app/code/core/Mage/Eav/Model/Entity/Collection/Abstract.php(784): Mage_Eav_Model_Entity_Collection_Abstract->_loadEntities(false, false)
#3 /var/www/html/lib/Varien/Data/Collection.php(669): Mage_Eav_Model_Entity_Collection_Abstract->load()
#4 /var/www/html/app/code/local/IB/IbCatalog/Model/Catalog.php(557): Varien_Data_Collection->getIterator()
#5 /var/www/html/app/code/local/IB/IbCatalog/controllers/IndexController.php(130): IB_IbCatalog_Model_Catalog->getCollectionProduct()
#6 /var/www/html/app/code/local/Mage/Core/Controller/Varien/Action.php(380): IB_IbCatalog_IndexController->indexAction()
#7 /var/www/html/app/code/core/Mage/Core/Controller/Varien/Router/Standard.php(248): Mage_Core_Controller_Varien_Action->dispatch('index')
#8 /var/www/html/app/code/core/Mage/Core/Controller/Varien/Front.php(158): Mage_Core_Controller_Varien_Router_Standard->match(Object(Mage_Core_Controller_Request_Http))
#9 /var/www/html/app/Mage.php(459): Mage_Core_Controller_Varien_Front->dispatch()
#10 /var/www/html/index.php(66): Mage::run()
#11 {main}