**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.
bool is_covered_by_min_max_block = part->info.min_block <= drop_range.min_block && part->info.max_block >= drop_range.max_block && part->info.getMutationVersion() >= drop_range.getMutationVersion();
            if (is_covered_by_min_max_block)
            {
                LOG_INFO(log, "Skipping drop range for part {} because covering part {} already exists", drop_range.getPartName(), part->name);
                return {};
            }
        }
        if (part->info.min_block < drop_range.min_block)
        {
            if (drop_range.min_block <= part->info.max_block)
            {
                
                throw Exception(ErrorCodes::LOGICAL_ERROR, "Unexpected merged part {} intersecting drop range {}",
                                part->name, drop_range.getPartName());
            }
            continue;
        }
        
        if (part->info.min_block > drop_range.max_block)