def _format_duration_field(status_information):
    """Format the *duration* field.

    :param status_information: The various fields information
    :type status_information: :class:`collections.defaultdict`
    :returns: The updated status informations
    :rtype: :class:`collections.defaultdict`
    """
    try:
        duration = int(''.join(status_information['duration']))
        status_information['duration'] = '{0:02d}:{1:02d}'.format(duration //
            60, duration % 60)
    except ValueError:
        status_information.pop('duration', None)
    return status_information
