-- Tables affected: stock_log
-- recovery.not-started: check first; CHANGE COLUMN fails if partnumber already exists
-- recovery.partial: ALTER TABLE stock_log CHANGE COLUMN partnumber lot VARCHAR(255) NOT NULL;
-- recovery.completed: no action needed
-- verify: partnumber column in stock_log missing | SELECT 1 FROM information_schema.COLUMNS WHERE table_schema=DATABASE() AND table_name='stock_log' AND column_name='partnumber' HAVING COUNT(*)=0

ALTER TABLE stock_log
    CHANGE COLUMN lot partnumber VARCHAR(255) NOT NULL;