**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.
LOG_ERROR(log,
                "Detaching broken part {}{} (size: {}). "
                "If it happened after update, it is likely because of backward incompability. "
                "You need to resolve this manually",
                getFullPathOnDisk(part_disk_ptr), part_name, formatReadableSizeWithBinarySuffix(size_of_part));
            std::lock_guard loading_lock(mutex);
            broken_parts_to_detach.push_back(part);
            ++suspicious_broken_parts;
            suspicious_broken_parts_bytes += size_of_part;
            return;
        }
        if (!part->index_granularity_info.is_adaptive)
            has_non_adaptive_parts.store(true, std::memory_order_relaxed);
        else
            has_adaptive_parts.store(true, std::memory_order_relaxed);
        part->modification_time = part_disk_ptr->getLastModified(fs::path(relative_data_path) / part_name).epochTime();
        
        part->setState(DataPartState::Committed);
        std::lock_guard loading_lock(mutex);
        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);