**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.
#include <Storages/IndicesDescription.h>
#include <Storages/MergeTree/MergeTreePartsMover.h>
#include <Storages/MergeTree/MergeTreeWriteAheadLog.h>
#include <Storages/MergeTree/PinnedPartUUIDs.h>
#include <Interpreters/PartLog.h>
#include <Disks/StoragePolicy.h>
#include <Interpreters/Aggregator.h>
#include <Storages/extractKeyExpressionList.h>
#include <Storages/PartitionCommands.h>
#include <boost/multi_index_container.hpp>
#include <boost/multi_index/ordered_index.hpp>
#include <boost/multi_index/global_fun.hpp>
#include <boost/range/iterator_range_core.hpp>
namespace DB
{
class AlterCommands;
class MergeTreePartsMover;
class MergeTreeDataMergerMutator;
class MutationCommands;
class Context;
struct JobAndPool;
struct EmergingPartInfo
{
    String disk_name;
    String partition_id;
    size_t estimate_bytes;
};
struct CurrentlySubmergingEmergingTagger;
struct SelectQueryOptions;
class ExpressionActions;