Автоматическая установка изображения раздела из товара в 1С-Битрикс

<?php
require_once($_SERVER["DOCUMENT_ROOT"]."/bitrix/modules/main/include/prolog_before.php");

\Bitrix\Main\Loader::includeModule('iblock');

$sections = CIBlockSection::GetList(
    ['ID' => 'ASC'],
    [
        'IBLOCK_ID' => 17,
        'PICTURE' => false,
        'SECTION_ID' => false // только корневые разделы
    ],
    false,
    ['ID']
);

while ($section = $sections->GetNext()) {
    $element = CIBlockElement::GetList(
        ['SORT' => 'ASC'],
        [
            'IBLOCK_ID' => 17,
            'ACTIVE' => 'Y',
            '!DETAIL_PICTURE' => false,
            'SECTION_ID' => $section['ID'],
            'INCLUDE_SUBSECTIONS' => 'N' // не искать в подразделах
        ],
        false,
        ['nTopCount' => 1],
        ['DETAIL_PICTURE']
    )->Fetch();

    if ($element && !empty($element['DETAIL_PICTURE'])) {
        $fileArray = CFile::MakeFileArray($element['DETAIL_PICTURE']);
        $sectionUpdater = new CIBlockSection;
        $sectionUpdater->Update($section['ID'], ['PICTURE' => $fileArray]);
    }
}
?>