ALTER TABLE /*$wgDBprefix*/archive DROP COLUMN ar_content_model; ALTER TABLE /*$wgDBprefix*/archive DROP COLUMN ar_content_format; ALTER TABLE /*$wgDBprefix*/revision DROP COLUMN rev_content_model; ALTER TABLE /*$wgDBprefix*/revision DROP COLUMN rev_content_format; ALTER TABLE /*$wgDBprefix*/page DROP COLUMN page_content_model;