1 2ALTER TABLE `tiki_tracker_item_fields` DROP PRIMARY KEY; 3ALTER TABLE `tiki_tracker_item_fields` DROP KEY `lang`; 4ALTER TABLE `tiki_tracker_item_fields` DROP COLUMN `lang`; 5ALTER TABLE `tiki_tracker_item_fields` ADD PRIMARY KEY (`itemId`, `fieldId`); 6 7ALTER TABLE `tiki_tracker_item_field_logs` DROP COLUMN `lang`; 8