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

#0 /var/www/vhosts/whitehatsstore.com/httpdocs/includes/src/__default.php(60579): Zend_Db_Select->_join('inner join', Array, 'manufacturer_id...', Array, NULL)
#1 /var/www/vhosts/whitehatsstore.com/httpdocs/includes/src/__default.php(59284): Varien_Db_Select->_join('inner join', Array, 'manufacturer_id...', Array, NULL)
#2 /var/www/vhosts/whitehatsstore.com/httpdocs/includes/src/__default.php(59263): Zend_Db_Select->joinInner(Array, 'manufacturer_id...', Array, NULL)
#3 /var/www/vhosts/whitehatsstore.com/httpdocs/includes/src/Mage_Catalog_Model_Resource_Layer_Filter_Attribute.php(70): Zend_Db_Select->join(Array, 'manufacturer_id...', Array)
#4 /var/www/vhosts/whitehatsstore.com/httpdocs/includes/src/Mage_Catalog_Model_Layer_Filter_Attribute.php(94): Mage_Catalog_Model_Resource_Layer_Filter_Attribute->applyFilterToCollection(Object(MT_Attribute_Model_Catalog_Layer_Filter_Attribute), '9')
#5 /var/www/vhosts/whitehatsstore.com/httpdocs/includes/src/Mage_Catalog_Block_Layer_Filter_Abstract.php(91): Mage_Catalog_Model_Layer_Filter_Attribute->apply(Object(Mage_Core_Controller_Request_Http), Object(Mage_Catalog_Block_Layer_Filter_Attribute))
#6 /var/www/vhosts/whitehatsstore.com/httpdocs/includes/src/Mage_Catalog_Block_Layer_Filter_Abstract.php(73): Mage_Catalog_Block_Layer_Filter_Abstract->_initFilter()
#7 /var/www/vhosts/whitehatsstore.com/httpdocs/includes/src/Mage_Catalog_Block_Layer_View.php(136): Mage_Catalog_Block_Layer_Filter_Abstract->init()
#8 /var/www/vhosts/whitehatsstore.com/httpdocs/includes/src/__default.php(1966): Mage_Catalog_Block_Layer_View->_prepareLayout()
#9 /var/www/vhosts/whitehatsstore.com/httpdocs/includes/src/__default.php(27705): Mage_Core_Block_Abstract->setLayout(Object(MagenThemes_MTTheme_Model_System_Layout_Layout))
#10 /var/www/vhosts/whitehatsstore.com/httpdocs/includes/src/__default.php(27721): Mage_Core_Model_Layout->createBlock('catalog/layer_v...', 'catalog.leftnav')
#11 /var/www/vhosts/whitehatsstore.com/httpdocs/includes/src/__default.php(27488): Mage_Core_Model_Layout->addBlock('catalog/layer_v...', 'catalog.leftnav')
#12 /var/www/vhosts/whitehatsstore.com/httpdocs/includes/src/__default.php(27454): Mage_Core_Model_Layout->_generateBlock(Object(Mage_Core_Model_Layout_Element), Object(Mage_Core_Model_Layout_Element))
#13 /var/www/vhosts/whitehatsstore.com/httpdocs/includes/src/__default.php(27459): Mage_Core_Model_Layout->generateBlocks(Object(Mage_Core_Model_Layout_Element))
#14 /var/www/vhosts/whitehatsstore.com/httpdocs/includes/src/__default.php(13895): Mage_Core_Model_Layout->generateBlocks()
#15 /var/www/vhosts/whitehatsstore.com/httpdocs/app/code/community/MT/Filter/controllers/Catalog/CategoryController.php(49): Mage_Core_Controller_Varien_Action->generateLayoutBlocks()
#16 /var/www/vhosts/whitehatsstore.com/httpdocs/includes/src/__default.php(13969): MT_Filter_Catalog_CategoryController->viewAction()
#17 /var/www/vhosts/whitehatsstore.com/httpdocs/includes/src/__default.php(18331): Mage_Core_Controller_Varien_Action->dispatch('view')
#18 /var/www/vhosts/whitehatsstore.com/httpdocs/includes/src/__default.php(17865): Mage_Core_Controller_Varien_Router_Standard->match(Object(Mage_Core_Controller_Request_Http))
#19 /var/www/vhosts/whitehatsstore.com/httpdocs/includes/src/__default.php(20465): Mage_Core_Controller_Varien_Front->dispatch()
#20 /var/www/vhosts/whitehatsstore.com/httpdocs/app/Mage.php(684): Mage_Core_Model_App->run(Array)
#21 /var/www/vhosts/whitehatsstore.com/httpdocs/index.php(87): Mage::run('', 'store')
#22 {main}