**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.
DataPartsVector & ,
    DataPartsVector & duplicate_parts_to_remove,
    MutableDataPartsVector & parts_from_wal,
    DataPartsLock & part_lock)
{
    for (auto & part : parts_from_wal)
    {
        if (getActiveContainingPart(part->info, DataPartState::Committed, part_lock))
            continue;
        part->modification_time = time(nullptr);
        
        part->setState(DataPartState::Committed);
        auto [it, inserted] = data_parts_indexes.insert(part);
        if (!inserted)
        {
            if ((*it)->checksums.getTotalChecksumHex() == part->checksums.getTotalChecksumHex())
            {
                LOG_ERROR(log, "Remove duplicate part {}", part->getFullPath());
                duplicate_parts_to_remove.push_back(part);
            }
            else
                throw Exception("Part " + part->name + " already exists but with different checksums", ErrorCodes::DUPLICATE_DATA_PART);
        }
        addPartContributionToDataVolume(part);
    }
}
void MergeTreeData::loadDataParts(bool skip_sanity_checks)