Ошибка фильтрации товаров в админке диафан 6

Здравствуйте, стоит диафан шестой версии, у клиента много характеристик и 11000товаров, клиент выбирает в админке фильтровать к примеру Тип - кирпич и получет 502 ошибку и в адресной строке получает такого виду урл 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как решить эту проблему чтоб клиент мог фильтровать товары в админке и получать нужный результат?