ALTER TABLE character_db_version CHANGE COLUMN required_9635_01_characters_characters required_9646_01_characters_characters bit;

UPDATE characters, data_backup
SET characters.knownTitles = SUBSTRING(data_backup.data,
length(SUBSTRING_INDEX(data_backup.data, ' ', 626))+2,
length(SUBSTRING_INDEX(data_backup.data, ' ', 631+1))- length(SUBSTRING_INDEX(data_backup.data, ' ', 626)) - 1)
WHERE characters.guid=data_backup.guid;