**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.
else
            {
                
                minmax_idx_date_column_pos = -1;
            }
        }
    }
    if (!has_date_column)
    {
        for (size_t i = 0; i < minmax_idx_columns_types.size(); ++i)
        {
            if (isDateTime(minmax_idx_columns_types[i])
                || isDateTime64(minmax_idx_columns_types[i])
            )
            {
                if (!has_datetime_column)
                {
                    minmax_idx_time_column_pos = i;
                    has_datetime_column = true;
                }
                else
                {
                    
                    minmax_idx_time_column_pos = -1;
                }
            }
        }
    }
}
void MergeTreeData::checkTTLExpressions(const StorageInMemoryMetadata & new_metadata, const StorageInMemoryMetadata & old_metadata) const