Mage registry key "BASE_URL" already exists

#0 /home/frvisiorx/public_html/app/Mage.php(226): Mage::throwException('Mage registry k...')
#1 /home/frvisiorx/public_html/app/design/frontend/visio-rx_3.0/visio/template/page/html/head.phtml(52): Mage::register('BASE_URL', 'https://www.vis...')
#2 /home/frvisiorx/public_html/app/code/core/Mage/Core/Block/Template.php(241): include('/home/frvisiorx...')
#3 /home/frvisiorx/public_html/app/code/core/Mage/Core/Block/Template.php(272): Mage_Core_Block_Template->fetchView('frontend/visio-...')
#4 /home/frvisiorx/public_html/app/code/core/Mage/Core/Block/Template.php(286): Mage_Core_Block_Template->renderView()
#5 /home/frvisiorx/public_html/app/code/core/Mage/Core/Block/Abstract.php(923): Mage_Core_Block_Template->_toHtml()
#6 /home/frvisiorx/public_html/app/code/core/Mage/Core/Block/Abstract.php(641): Mage_Core_Block_Abstract->toHtml()
#7 /home/frvisiorx/public_html/app/code/core/Mage/Core/Block/Abstract.php(585): Mage_Core_Block_Abstract->_getChildHtml('head', true)
#8 /home/frvisiorx/public_html/app/design/frontend/visio-rx_3.0/visio/template/page/1column.phtml(4): Mage_Core_Block_Abstract->getChildHtml('head')
#9 /home/frvisiorx/public_html/app/code/core/Mage/Core/Block/Template.php(241): include('/home/frvisiorx...')
#10 /home/frvisiorx/public_html/app/code/core/Mage/Core/Block/Template.php(272): Mage_Core_Block_Template->fetchView('frontend/visio-...')
#11 /home/frvisiorx/public_html/app/code/core/Mage/Core/Block/Template.php(286): Mage_Core_Block_Template->renderView()
#12 /home/frvisiorx/public_html/app/code/core/Mage/Core/Block/Abstract.php(923): Mage_Core_Block_Template->_toHtml()
#13 /home/frvisiorx/public_html/app/code/core/Mage/Core/Model/Layout.php(555): Mage_Core_Block_Abstract->toHtml()
#14 /home/frvisiorx/public_html/app/code/core/Mage/Core/Controller/Varien/Action.php(390): Mage_Core_Model_Layout->getOutput()
#15 /home/frvisiorx/public_html/app/code/core/Mage/Cms/Helper/Page.php(137): Mage_Core_Controller_Varien_Action->renderLayout()
#16 /home/frvisiorx/public_html/app/code/core/Mage/Cms/Helper/Page.php(52): Mage_Cms_Helper_Page->_renderPage(Object(JR_CleverCms_Cms_IndexController), '4304')
#17 /home/frvisiorx/public_html/app/code/community/JR/CleverCms/Helper/Cms/Page.php(13): Mage_Cms_Helper_Page->renderPage(Object(JR_CleverCms_Cms_IndexController), '4304')
#18 /home/frvisiorx/public_html/app/code/core/Mage/Cms/controllers/IndexController.php(75): JR_CleverCms_Helper_Cms_Page->renderPage(Object(JR_CleverCms_Cms_IndexController), '4304')
#19 /home/frvisiorx/public_html/app/code/core/Mage/Core/Controller/Varien/Action.php(418): Mage_Cms_IndexController->noRouteAction()
#20 /home/frvisiorx/public_html/app/code/core/Mage/Core/Controller/Varien/Router/Standard.php(254): Mage_Core_Controller_Varien_Action->dispatch('noRoute')
#21 /home/frvisiorx/public_html/app/code/core/Mage/Core/Controller/Varien/Front.php(172): Mage_Core_Controller_Varien_Router_Standard->match(Object(Mage_Core_Controller_Request_Http))
#22 /home/frvisiorx/public_html/app/code/core/Mage/Core/Model/App.php(381): Mage_Core_Controller_Varien_Front->dispatch()
#23 /home/frvisiorx/public_html/app/Mage.php(687): Mage_Core_Model_App->run(Array)
#24 /home/frvisiorx/public_html/index.php(90): Mage::run('', 'store')
#25 {main}