**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.
if (!added_columns.contains(col) || deleted_columns.contains(col))
                    throw Exception("Existing column " + backQuoteIfNeed(col) + " is used in the expression that was "
                        "added to the sorting key. You can add expressions that use only the newly added columns",
                        ErrorCodes::BAD_ARGUMENTS);
                if (new_metadata.columns.getDefaults().count(col))
                    throw Exception("Newly added column " + backQuoteIfNeed(col) + " has a default expression, so adding "
                        "expressions that use it to the sorting key is forbidden",
                        ErrorCodes::BAD_ARGUMENTS);
            }
        }
    }
    if (!new_metadata.secondary_indices.empty())
    {
        std::unordered_set<String> indices_names;
        for (const auto & index : new_metadata.secondary_indices)
        {
            MergeTreeIndexFactory::instance().validate(index, attach);
            if (indices_names.find(index.name) != indices_names.end())
                throw Exception(
                        "Index with name " + backQuote(index.name) + " already exists",
                        ErrorCodes::LOGICAL_ERROR);
            indices_names.insert(index.name);
        }
    }
    if (!new_metadata.projections.empty())
    {
        std::unordered_set<String> projections_names;
        for (const auto & projection : new_metadata.projections)
        {
            if (projections_names.find(projection.name) != projections_names.end())