ALTER TABLE recordings ADD COLUMN jam_track_id BIGINT REFERENCES jam_tracks(id);
ALTER TABLE recordings ADD COLUMN jam_track_initiator_id VARCHAR(64) REFERENCES users(id);

CREATE TABLE recorded_jam_track_tracks (
    id BIGINT PRIMARY KEY,
    user_id VARCHAR(64) NOT NULL REFERENCES users(id) ON DELETE CASCADE,
    jam_track_track_id VARCHAR(64) REFERENCES jam_track_tracks(id) NOT NULL,
    recording_id VARCHAR(64) REFERENCES recordings(id) NOT NULL,
    discard BOOLEAN,
    timeline JSON,
    created_at TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP,
    updated_at TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP
);

ALTER TABLE recorded_jam_track_tracks ALTER COLUMN id SET DEFAULT nextval('tracks_next_tracker_seq');