ALTER TABLE `vn`.`entry` ADD observationEditorFk INT(10) unsigned NULL COMMENT 'Último usuario que ha modificado el campo evaNotes';
ALTER TABLE `vn`.`entry` ADD CONSTRAINT entry_observationEditorFk FOREIGN KEY (observationEditorFk) REFERENCES account.user(id) ON UPDATE CASCADE;

UPDATE
	`vn`.`entry` e
SET
	observationEditorFk = (
		SELECT w.userFk
		FROM
			`vn`.`worker` w
		JOIN `account`.`user` u ON
			u.id = w.userFk
		WHERE
			w.code = RIGHT(e.evaNotes,3)),
	evaNotes = LEFT(evaNotes,LENGTH(evaNotes)-5)