**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.
{
        std::lock_guard lock(currently_processing_in_background_mutex);
        auto mutations_begin_it = current_mutations_by_version.upper_bound(sources_data_version);
        auto mutations_end_it = current_mutations_by_version.upper_bound(result_data_version);
        for (auto it = mutations_begin_it; it != mutations_end_it; ++it)
        {
            MergeTreeMutationEntry & entry = it->second;
            if (is_successful)
            {
                if (!entry.latest_failed_part.empty() && result_part->part_info.contains(entry.latest_failed_part_info))
                {
                    entry.latest_failed_part.clear();
                    entry.latest_failed_part_info = MergeTreePartInfo();
                    entry.latest_fail_time = 0;
                    entry.latest_fail_reason.clear();
                }
            }
            else
            {
                entry.latest_failed_part = result_part->parts.at(0)->name;
                entry.latest_failed_part_info = result_part->parts.at(0)->info;
                entry.latest_fail_time = time(nullptr);
                entry.latest_fail_reason = exception_message;
            }
        }
    }
    std::unique_lock lock(mutation_wait_mutex);
    mutation_wait_event.notify_all();
}
void StorageMergeTree::waitForMutation(Int64 version, const String & file_name)