ALTER TABLE acquisition_settings DROP COLUMN import_root;

DELETE FROM release_blocks WHERE reason = 'import';
ALTER TABLE release_blocks DROP CONSTRAINT release_blocks_reason_check;
ALTER TABLE release_blocks ADD CONSTRAINT release_blocks_reason_check
    CHECK (reason IN ('operator', 'files'));

DROP INDEX grabs_live_idx;

UPDATE grabs SET end_reason = 'superseded' WHERE end_reason IN ('imported', 'refused', 'held');
ALTER TABLE grabs DROP CONSTRAINT grabs_end_reason_check;
ALTER TABLE grabs ADD CONSTRAINT grabs_end_reason_check CHECK (end_reason IN ('', 'superseded'));

ALTER TABLE grabs
    DROP COLUMN progress,
    DROP COLUMN import_state,
    DROP COLUMN import_reason,
    DROP COLUMN import_detail,
    DROP COLUMN import_forced,
    DROP COLUMN import_attempts,
    DROP COLUMN import_updated_at,
    DROP COLUMN imported_at,
    DROP COLUMN imported_files,
    DROP COLUMN destination;