-- #6176: gone, a release its download client would not let Minstrel follow:
-- held outside Minstrel's category, or leaving the client twice. Held back
-- until expires_at, as stalled is.
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', 'import', 'stalled', 'gone'));