DELETE FROM photo_objects WHERE role = 'playback';

ALTER TABLE photo_objects DROP CONSTRAINT IF EXISTS photo_objects_role_check;
ALTER TABLE photo_objects ADD CONSTRAINT photo_objects_role_check
    CHECK (role IN ('original', 'thumb', 'medium', 'preview'));

ALTER TABLE variant_jobs DROP COLUMN IF EXISTS kind;
ALTER TABLE photos DROP COLUMN IF EXISTS duration_ms;
ALTER TABLE photos DROP COLUMN IF EXISTS kind;