def METHOD_NAME(source_id):
    params = {
        "uuid": str(uuid.uuid4()),
        "source_id": source_id,
        "filename": random_chars(50),
        "size": random.randint(0, 1024 * 1024 * 500),
        "downloaded": bool_or_none(),
        "checksum": random_chars(255, chars="0123456789abcdef"),
    }
    sql = """
    INSERT INTO submissions (uuid, source_id, filename, size, downloaded, checksum)
    VALUES (:uuid, :source_id, :filename, :size, :downloaded, :checksum)
    """
    db.engine.execute(text(sql), **params)