You cannot define a correlation name 'manufacturer_idx' more than once

#0 /chroot/home/a59cb4fa/0d46498323.nxcli.net/html/lib/Zend/Db/Select.php(325): Zend_Db_Select->_join('inner join', Array, 'manufacturer_id...', Array, NULL)
#1 /chroot/home/a59cb4fa/0d46498323.nxcli.net/html/lib/Zend/Db/Select.php(304): Zend_Db_Select->joinInner(Array, 'manufacturer_id...', Array, NULL)
#2 /chroot/home/a59cb4fa/0d46498323.nxcli.net/html/app/code/core/Mage/Catalog/Model/Resource/Eav/Mysql4/Layer/Filter/Attribute.php(70): Zend_Db_Select->join(Array, 'manufacturer_id...', Array)
#3 /chroot/home/a59cb4fa/0d46498323.nxcli.net/html/app/code/core/Mage/Catalog/Model/Layer/Filter/Attribute.php(94): Mage_Catalog_Model_Resource_Eav_Mysql4_Layer_Filter_Attribute->applyFilterToCollection(Object(Mage_Catalog_Model_Layer_Filter_Attribute), '200')
#4 /chroot/home/a59cb4fa/0d46498323.nxcli.net/html/app/code/core/Mage/Catalog/Block/Layer/Filter/Abstract.php(85): Mage_Catalog_Model_Layer_Filter_Attribute->apply(Object(Mage_Core_Controller_Request_Http), Object(Mage_Catalog_Block_Layer_Filter_Attribute))
#5 /chroot/home/a59cb4fa/0d46498323.nxcli.net/html/app/code/core/Mage/Catalog/Block/Layer/Filter/Abstract.php(67): Mage_Catalog_Block_Layer_Filter_Abstract->_initFilter()
#6 /chroot/home/a59cb4fa/0d46498323.nxcli.net/html/app/code/core/Mage/Catalog/Block/Layer/View.php(76): Mage_Catalog_Block_Layer_Filter_Abstract->init()
#7 /chroot/home/a59cb4fa/0d46498323.nxcli.net/html/var/ait_rewrite/6bfe16ca572eea47db567910902c6209.php(213): Mage_Catalog_Block_Layer_View->_prepareLayout()
#8 /chroot/home/a59cb4fa/0d46498323.nxcli.net/html/app/code/core/Mage/Core/Model/Layout.php(457): Aitoc_Aitsys_Model_Rewriter_Mage_Core_Block_Abstract->setLayout(Object(Aitoc_Aitsys_Model_Core_Layout))
#9 /chroot/home/a59cb4fa/0d46498323.nxcli.net/html/app/code/core/Mage/Core/Model/Layout.php(241): Mage_Core_Model_Layout->addBlock('Mage_Catalog_Bl...', 'catalog.leftnav')
#10 /chroot/home/a59cb4fa/0d46498323.nxcli.net/html/app/code/core/Mage/Core/Model/Layout.php(207): Mage_Core_Model_Layout->_generateBlock(Object(Mage_Core_Model_Layout_Element), Object(Mage_Core_Model_Layout_Element))
#11 /chroot/home/a59cb4fa/0d46498323.nxcli.net/html/app/code/core/Mage/Core/Model/Layout.php(212): Mage_Core_Model_Layout->generateBlocks(Object(Mage_Core_Model_Layout_Element))
#12 /chroot/home/a59cb4fa/0d46498323.nxcli.net/html/app/code/core/Mage/Core/Controller/Varien/Action.php(343): Mage_Core_Model_Layout->generateBlocks()
#13 /chroot/home/a59cb4fa/0d46498323.nxcli.net/html/app/code/core/Mage/Cms/Helper/Page.php(106): Mage_Core_Controller_Varien_Action->generateLayoutBlocks()
#14 /chroot/home/a59cb4fa/0d46498323.nxcli.net/html/app/code/core/Mage/Cms/Helper/Page.php(52): Mage_Cms_Helper_Page->_renderPage(Object(Mage_Cms_IndexController), 'home')
#15 /chroot/home/a59cb4fa/0d46498323.nxcli.net/html/app/code/core/Mage/Cms/controllers/IndexController.php(75): Mage_Cms_Helper_Page->renderPage(Object(Mage_Cms_IndexController), 'home')
#16 /chroot/home/a59cb4fa/0d46498323.nxcli.net/html/app/code/core/Mage/Core/Controller/Varien/Action.php(419): Mage_Cms_IndexController->noRouteAction()
#17 /chroot/home/a59cb4fa/0d46498323.nxcli.net/html/app/code/core/Mage/Core/Controller/Varien/Router/Standard.php(254): Mage_Core_Controller_Varien_Action->dispatch('noRoute')
#18 /chroot/home/a59cb4fa/0d46498323.nxcli.net/html/app/code/core/Mage/Core/Controller/Varien/Front.php(177): Mage_Core_Controller_Varien_Router_Standard->match(Object(Mage_Core_Controller_Request_Http))
#19 /chroot/home/a59cb4fa/0d46498323.nxcli.net/html/app/code/core/Mage/Core/Model/App.php(304): Mage_Core_Controller_Varien_Front->dispatch()
#20 /chroot/home/a59cb4fa/0d46498323.nxcli.net/html/app/Mage.php(596): Mage_Core_Model_App->run(Array)
#21 /chroot/home/a59cb4fa/0d46498323.nxcli.net/html/index.php(105): Mage::run('', 'store')
#22 {main}