**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.
BrokenPartCallback broken_part_callback;
    String log_name;
    Poco::Logger * log;
    
    
    MultiVersion<MergeTreeSettings> storage_settings;
    
    mutable std::shared_mutex pinned_part_uuids_mutex;
    PinnedPartUUIDsPtr pinned_part_uuids;
    
    struct TagByInfo{};
    struct TagByStateAndInfo{};
    static const MergeTreePartInfo & dataPartPtrToInfo(const DataPartPtr & part)
    {
        return part->info;
    }
    static DataPartStateAndInfo dataPartPtrToStateAndInfo(const DataPartPtr & part)
    {
        return {part->getState(), part->info};
    }
    using DataPartsIndexes = boost::multi_index_container<DataPartPtr,
        boost::multi_index::indexed_by<
            
            boost::multi_index::ordered_unique<
                boost::multi_index::tag<TagByInfo>,
                boost::multi_index::global_fun<const DataPartPtr &, const MergeTreePartInfo &, dataPartPtrToInfo>
            >,
            
            boost::multi_index::ordered_unique<