1 -- 2 -- These database columns are not used in Joomla 3.10 but will be used in Joomla 4. 3 -- They are added to 3.10 because otherwise the update to 4 will fail. 4 -- 5 ALTER TABLE "#__template_styles" ADD COLUMN "inheritable" smallint NOT NULL DEFAULT 0; 6 ALTER TABLE "#__template_styles" ADD COLUMN "parent" character varying(50) DEFAULT '';