-- uninstall previous What's New tours
DELETE FROM "#__guidedtour_steps"
 WHERE "tour_id" IN (SELECT "id" FROM "#__guidedtours" WHERE "uid" IN ('joomla-whatsnew-5-2', 'joomla-whatsnew-5-3', 'joomla-whatsnew-5-4'));

DELETE FROM "#__guidedtours"
 WHERE "uid" IN ('joomla-whatsnew-5-2', 'joomla-whatsnew-5-3', 'joomla-whatsnew-5-4');