def report_updated_registration(json_obj):
    """
    Generate message for updated registration.

    Args:
        json_obj (obj): JSON obj.

    Returns:
        string: Message.
    """
    name = json_obj['Dogodek']
    registration_status = json_obj['Registration Status']
    event_url = json_obj['Link']
    msg = "New _SloComps_ notification: Registrations status for competition *{}* changed to *{}*. Check [event page]({}) for more info.".format(
        name, registration_status, event_url)

    return msg