I upgraded from 21.4.3 to 21.4.4 and my `complex_key_hashed` dictionaries with `update_field` cannot load anymore
```
2021.04.30 13:13:01.913021 [ 7023 ] {} <Error> ExternalDictionariesLoader: Could not load external dictionary 'complex_key_hashed_dict', next update is scheduled at 2021-04-30 13:14:06: std::exception. Code: 1001, type: std::length_error, e.what() = basic_string, Stack trace (when copying this message, always include the lines below):

0. ? @ 0x891bc99 in /usr/bin/clickhouse
1. ? @ 0x891bc60 in /usr/bin/clickhouse
2. ? @ 0x1435753b in ?
3. ? @ 0x1435871c in ?
4. DB::Field::operator=(std::__1::basic_string_view<char, std::__1::char_traits<char> > const&) @ 0xf997726 in /usr/bin/clickhouse
5. DB::ColumnString::get(unsigned long, DB::Field&) const @ 0xfa7d1d2 in /usr/bin/clickhouse
6. auto DB::HashedDictionary<(DB::DictionaryKeyType)1, false>::blockToAttributes(DB::Block const&)::'lambda'(auto&)::operator()<HashMapTable<StringRef, HashMapCellWithSavedHash<StringRef, StringRef, DefaultHash<StringRef, void>, HashTableNoState>, DefaultHash<StringRef, void>, HashTableGrower<8ul>, Allocator<true, true> > >(auto&) const @ 0xda21c0d in /usr/bin/clickhouse
7. DB::HashedDictionary<(DB::DictionaryKeyType)1, false>::blockToAttributes(DB::Block const&) @ 0xd91f299 in /usr/bin/clickhouse
8. DB::HashedDictionary<(DB::DictionaryKeyType)1, false>::updateData() @ 0xd9211a4 in /usr/bin/clickhouse
9. DB::HashedDictionary<(DB::DictionaryKeyType)1, false>::loadData() @ 0xd91dd5a in /usr/bin/clickhouse
10. DB::HashedDictionary<(DB::DictionaryKeyType)1, false>::HashedDictionary(DB::StorageID const&, DB::DictionaryStructure const&, std::__1::unique_ptr<DB::IDictionarySource, std::__1::default_delete<DB::IDictionarySource> >, DB::ExternalLoadableLifetime, bool, std::__1::shared_ptr<DB::Block>) @ 0xd91dad9 in /usr/bin/clickhouse
11. ? @ 0xda26b8d in /usr/bin/clickhouse
12. ? @ 0xda26ecc in /usr/bin/clickhouse
13. DB::DictionaryFactory::create(std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&, Poco::Util::AbstractConfiguration const&, std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&, DB::Context const&, bool) const @ 0xee13c28 in /usr/bin/clickhouse
14. DB::ExternalDictionariesLoader::create(std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&, Poco::Util::AbstractConfiguration const&, std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&, std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&) const @ 0xf40bea1 in /usr/bin/clickhouse
15. DB::ExternalLoader::LoadingDispatcher::loadSingleObject(std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&, DB::ExternalLoader::ObjectConfig const&, std::__1::shared_ptr<DB::IExternalLoadable const>) @ 0xf417de7 in /usr/bin/clickhouse
16. DB::ExternalLoader::LoadingDispatcher::doLoading(std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&, unsigned long, bool, unsigned long, bool) @ 0xf415249 in /usr/bin/clickhouse
17. ThreadFromGlobalPool::ThreadFromGlobalPool<void (DB::ExternalLoader::LoadingDispatcher::*)(std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&, unsigned long, bool, unsigned long, bool), DB::ExternalLoader::LoadingDispatcher*, std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> >&, unsigned long&, bool&, unsigned long&, bool>(void (DB::ExternalLoader::LoadingDispatcher::*&&)(std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&, unsigned long, bool, unsigned long, bool), DB::ExternalLoader::LoadingDispatcher*&&, std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> >&, unsigned long&, bool&, unsigned long&, bool&&)::'lambda'()::operator()() @ 0xf41a421 in /usr/bin/clickhouse
18. ThreadPoolImpl<std::__1::thread>::worker(std::__1::__list_iterator<std::__1::thread, void*>) @ 0x8954fef in /usr/bin/clickhouse
19. ? @ 0x8958a83 in /usr/bin/clickhouse
20. start_thread @ 0x74a4 in /lib/x86_64-linux-gnu/libpthread-2.24.so
21. __clone @ 0xe8d0f in /lib/x86_64-linux-gnu/libc-2.24.so
 (version 21.4.4.30 (official build))
```
++indexes_to_remove_count;
            }
        }
        size_t rows = block.rows();
        for (size_t column_index = 0; column_index < block.columns(); ++column_index)
        {
            const auto update_column = block.safeGetByPosition(column_index).column;
            MutableColumnPtr & result_fetched_column = result_fetched_columns[column_index];
            result_fetched_column->insertRangeFrom(*update_column, 0, rows);
        }
    }
    stream->readSuffix();
    size_t result_fetched_rows = result_fetched_columns.front()->size();
    size_t filter_hint = filter.size() - indexes_to_remove_count;
    for (size_t column_index = 0; column_index < block_to_update.columns(); ++column_index)
    {
        auto & column = block_to_update.getByPosition(column_index).column;
        column = column->filter(filter, filter_hint);
        MutableColumnPtr mutable_column = column->assumeMutable();
        const IColumn & fetched_column = *result_fetched_columns[column_index];
        mutable_column->insertRangeFrom(fetched_column, 0, result_fetched_rows);
    }
}
/**
 * Returns ColumnVector data as PaddedPodArray.
 * If column is constant parameter backup_storage is used to store values.
 */
/
template <typename T>
static const PaddedPODArray<T> & getColumnVectorData(