**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.
part->name = part_name;
    part->info = part_info;
    part->is_temp = false;
    part->setState(DataPartState::PreCommitted);
    part->renameTo(part_name, true);
    auto part_it = data_parts_indexes.insert(part).first;
    if (out_transaction)
    {
        out_transaction->precommitted_parts.insert(part);
    }
    else
    {
        size_t reduce_bytes = 0;
        size_t reduce_rows = 0;
        size_t reduce_parts = 0;
        auto current_time = time(nullptr);
        for (const DataPartPtr & covered_part : covered_parts)
        {
            covered_part->remove_time.store(current_time, std::memory_order_relaxed);
            modifyPartState(covered_part, DataPartState::Outdated);
            removePartContributionToColumnAndSecondaryIndexSizes(covered_part);
            reduce_bytes += covered_part->getBytesOnDisk();
            reduce_rows += covered_part->rows_count;
            ++reduce_parts;
        }
        decreaseDataVolume(reduce_bytes, reduce_rows, reduce_parts);
        modifyPartState(part_it, DataPartState::Committed);