UPDATE vn.travel t
		JOIN(SELECT t.id travelFk, d.awbFk
			FROM vn.dua d
				JOIN vn.duaEntry de ON de.duaFk = d.id
				JOIN vn.`entry` e ON e.id = de.entryFk
				JOIN vn.travel t ON t.id = e.travelFk
			GROUP BY t.id
		)sub ON sub.travelFk = t.id 
	SET t.awbFk = sub.awbFk;