**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.
detached_parts.resize(std::distance(detached_parts.begin(), new_end_it));
        for (const auto & part_info : detached_parts)
        {
            LOG_DEBUG(log, "Found part {}", part_info.dir_name);
            active_parts.add(part_info.dir_name);
        }
        LOG_DEBUG(log, "{} of them are active", active_parts.size());
        /
        for (const auto & part_info : detached_parts)
        {
            const String containing_part = active_parts.getContainingPart(part_info.dir_name);
            if (!containing_part.empty() && containing_part != part_info.dir_name)
                part_info.disk->moveDirectory(fs::path(relative_data_path) / source_dir / part_info.dir_name,
                    fs::path(relative_data_path) / source_dir / ("inactive_" + part_info.dir_name));
            else
                renamed_parts.addPart(part_info.dir_name, "attaching_" + part_info.dir_name, part_info.disk);
        }
    }
    /
    renamed_parts.tryRenameAll();
    /
    LOG_DEBUG(log, "Checking parts");
    MutableDataPartsVector loaded_parts;
    loaded_parts.reserve(renamed_parts.old_and_new_names.size());
    for (const auto & [old_name, new_name, disk] : renamed_parts.old_and_new_names)
    {
        LOG_DEBUG(log, "Checking part {}", new_name);
        auto single_disk_volume = std::make_shared<SingleDiskVolume>("volume_" + old_name, disk);
        MutableDataPartPtr part = createPart(old_name, single_disk_volume, source_dir + new_name);
        loadPartAndFixMetadataImpl(part);