Mage registry key "jshtml" already exists

#0 /data/www/releases/20180514-103931/app/Mage.php(223): Mage::throwException('Mage registry k...')
#1 /data/www/releases/20180514-103931/app/code/local/Mage/Page/Block/Html/Head.php(365): Mage::register('jshtml', '