ALTER TABLE `vn`.`creditInsurance` ADD creditClassificationFk int(11) NULL;

UPDATE `vn`.`creditInsurance` AS `destiny`
   SET `destiny`.`creditClassificationFk`= (SELECT creditClassification FROM `vn`.`creditInsurance` AS `origin` WHERE `origin`.id = `destiny`.id);

ALTER TABLE `vn`.`creditInsurance`
   ADD CONSTRAINT `creditInsurance_creditClassificationFk` FOREIGN KEY (`creditClassificationFk`) 
   REFERENCES `vn`.`creditClassification` (`id`) ON DELETE CASCADE ON UPDATE CASCADE;