**How to reproduce**
Clickhouse server 20.13.1.5273
```
CREATE TABLE default.test
(
`key` UInt32,
`ts` DateTime CODEC(DoubleDelta, LZ4),
`db_time` DateTime DEFAULT now() COMMENT 'spout-ignore' CODEC(DoubleDelta, LZ4)
)
ENGINE = MergeTree
PARTITION BY toStartOfTenMinutes(db_time)
ORDER BY (key, ts)
TTL db_time + toIntervalHour(3)
SETTINGS index_granularity = 8192, merge_with_ttl_timeout = 3600, min_rows_for_compact_part = 1000000, min_bytes_for_compact_part = 200000000, in_memory_parts_enable_wal = 0;


INSERT INTO test(key, ts) SELECT number % 1000, now() + intDiv(number,1000) FROM numbers(500);

SELECT * FROM test;
500 rows in set. Elapsed: 0.003 sec.

DETACH TABLE test;

ATTACH TABLE test;

SELECT * FROM test;

0 rows in set. Elapsed: 0.002 sec.
```

**Expected behavior**
Clickhouse would flush parts on disk.
std::make_unique<BackupEntryFromImmutableFile>(disk, hardlink_filepath, checksum.file_size, file_hash, temp_dir_owner));
        }
        for (const auto & filepath : part->getFileNamesWithoutChecksums())
        {
            String relative_filepath = fs::path(part->relative_path) / filepath;
            backup_entries.emplace_back(relative_filepath, std::make_unique<BackupEntryFromSmallFile>(disk, part_dir / filepath));
        }
    }
    return backup_entries;
}
RestoreDataTasks MergeTreeData::restoreDataPartsFromBackup(const BackupPtr & backup, const String & data_path_in_backup,
                                                           const std::unordered_set<String> & partition_ids,
                                                           SimpleIncrement * increment)
{
    RestoreDataTasks restore_tasks;
    Strings part_names = backup->listFiles(data_path_in_backup);
    for (const String & part_name : part_names)
    {
        const auto part_info = MergeTreePartInfo::tryParsePartName(part_name, format_version);
        if (!part_info)
            continue;
        if (!partition_ids.empty() && !partition_ids.contains(part_info->partition_id))
            continue;
        UInt64 total_size_of_part = 0;
        Strings filenames = backup->listFiles(data_path_in_backup + part_name + "/", "");
        for (const String & filename : filenames)
            total_size_of_part += backup->getFileSize(data_path_in_backup + part_name + "/" + filename);
        std::shared_ptr<IReservation> reservation = getStoragePolicy()->reserveAndCheck(total_size_of_part);
        auto restore_task = [this,
                             backup,