ALTER TABLE  `kwf_pages_history` DROP FOREIGN KEY  `kwf_pages_history_ibfk_2` ;
ALTER TABLE  `kwf_pages_history` DROP FOREIGN KEY  `kwf_pages_history_ibfk_1` ;
ALTER TABLE  `kwf_pages_history` DROP FOREIGN KEY  `kwf_pages_history_ibfk_2` ;

Remove all foreign keys in history table
Remove all foreign keys in history table
