Каталог - специальные коллеции
Unknown field definition `UF_ADDITIONAL_SECTIONS` (UF_ADDITIONAL_SECTIONS) for \Bitrix\Iblock\Section9 Entity.
Специальные коллекции
Unknown field definition `UF_ADDITIONAL_SECTIONS` (UF_ADDITIONAL_SECTIONS) for \Bitrix\Iblock\Section9 Entity.