ALTER TABLE track_video CHANGE subtitles_burned subtitles_burned ENUM('forced_narrative','burned_in_subtitles') CHARACTER SET utf8 COLLATE utf8_general_ci NULL;; ALTER TABLE track_video CHANGE subtitles_burned subtitles_burned ENUM('y','n','forced_narrative','burned_in_subtitles') CHARACTER SET utf8 COLLATE utf8_general_ci NULL;;