MySQL - Eliminar duplicados en 1 tabla con 2 code 1 index key

ALTER IGNORE TABLE ra_lang_keys ADD UNIQUE INDEX(key);

CREATE TABLE IF NOT EXISTS `ra_lang_keys` (

  `ID` int(11) NOT NULL AUTO_INCREMENT,

  `Code` varchar(2) NOT NULL DEFAULT '0',

  `Module` enum('frontEnd','admin','common','ext','formats','email_tpl') NOT NULL DEFAULT 'common',

  `Key` varchar(255) NOT NULL DEFAULT '',

  `Value` mediumtext NOT NULL,

  `Plugin` varchar(100) NOT NULL DEFAULT '',

  `Status` enum('active','approval','trash') NOT NULL DEFAULT 'active',

  PRIMARY KEY (`ID`),

  KEY `Key` (`Key`),

  KEY `Code` (`Code`),

  KEY `Module` (`Module`),

    UNIQUE KEY (`Code`,`Key`)

) ENGINE=MyISAM  DEFAULT CHARSET=utf8 AUTO_INCREMENT=17355 ;

INSERT IGNORE INTO `ra_lang_keys` (`ID`, `Code`, `Module`, `Key`, `Value`, `Plugin`, `Status`) VALUES

(1, 'en', 'admin', 'listing_meta_keywords', 'Listing META Keywords', '', 'active'),

(2, 'en', 'admin', 'listing_meta_description', 'Listing META Description', '', 'active'),

(3, 'en', 'admin', 'listing_meta_keywords_des', 'enables building custom meta keywords for listings', '', 'active'),

(4, 'en', 'admin', 'listing_meta_description_des', 'enables building custom meta description for listings', '', 'active')........