Put all Mautic Custom fields into alphabetical order by label.

mautic-custom-fields-alphabetize.sql

UPDATE lead_fields AS f
CROSS JOIN (
	SELECT @cnt := 0
) AS dummy
JOIN (
	SELECT (@cnt := @cnt + 1) AS cnt, id
	FROM lead_fields
	CROSS JOIN (SELECT @cnt := 0) AS dummy
	ORDER BY label ASC
) AS c
SET f.field_order = c.cnt
WHERE f.id = c.id;