CREATE TRIGGER ad_project_status_updates_1
AFTER DELETE ON
    project_status_updates
FOR EACH ROW
BEGIN

    SELECT debug(
        'TRIGGER ad_project_status_updates_1',
        OLD.update_id,
        OLD.project_status_id,
        OLD.status,
        OLD.rank
    );

    INSERT OR IGNORE INTO
        project_status_tomerge(project_status_id)
    VALUES
        (OLD.project_status_id)
    ;

    UPDATE
        project_status_tomerge
    SET
        status = status + (OLD.status IS NOT NULL),
        rank   = rank + (OLD.rank IS NOT NULL)
    WHERE
        project_status_id = OLD.project_status_id
    ;

END;