**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.
{
                result.latest_failed_part = mutation_entry.latest_failed_part;
                result.latest_fail_reason = mutation_entry.latest_fail_reason;
                result.latest_fail_time = mutation_entry.latest_fail_time;
                
                
                if (mutation_ids)
                {
                    auto mutations_begin_it = current_mutations_by_version.upper_bound(data_version);
                    for (auto it = mutations_begin_it; it != current_mutations_by_version.end(); ++it)
                        
                        if (it->second.latest_fail_reason == result.latest_fail_reason)
                            mutation_ids->insert(it->second.file_name);
                }
            }
            return result;
        }
    }
    result.is_done = true;
    return result;
}
std::vector<MergeTreeMutationStatus> StorageMergeTree::getMutationsStatus() const
{
    std::unique_lock lock(currently_processing_in_background_mutex);
    auto part_versions_with_names = getSortedPartVersionsWithNames(lock);
    std::vector<MergeTreeMutationStatus> result;
    for (const auto & kv : current_mutations_by_version)
    {
        Int64 mutation_version = kv.first;
        const MergeTreeMutationEntry & entry = kv.second;