ALTER TABLE edi.ekt DROP INDEX ekt_batchNumber;

ALTER TABLE edi.ekt
	MODIFY COLUMN k3 tinyint(3) unsigned DEFAULT NULL NULL,
	MODIFY COLUMN k4 tinyint(3) unsigned DEFAULT NULL NULL;

ALTER TABLE edi.mail DROP COLUMN source;

ALTER TABLE edi.ekt DROP COLUMN vendorOrderNumber;

DELETE FROM edi.param WHERE code = 'vendorOrderNumber';