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-- using default 'unknown' to fill in the new column for compatibility
ALTER TABLE `fileset_version_info` ADD COLUMN `storage_location_name` VARCHAR(256) NOT NULL DEFAULT 'unknown' COMMENT 'fileset storage location name' AFTER `properties`;
ALTER TABLE `fileset_version_info` DROP INDEX `uk_fid_ver_del`;
ALTER TABLE `fileset_version_info` ADD CONSTRAINT `uk_fid_ver_sto_del` UNIQUE KEY (`fileset_id`, `version`, `storage_location_name`, `deleted_at`);
-- remove the default value for storage_location_name
ALTER TABLE `fileset_version_info` ALTER COLUMN `storage_location_name` DROP DEFAULT;
