**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.
{
    auto new_column_ttls = new_metadata.column_ttls_by_name;
    if (!new_column_ttls.empty())
    {
        NameSet columns_ttl_forbidden;
        if (old_metadata.hasPartitionKey())
            for (const auto & col : old_metadata.getColumnsRequiredForPartitionKey())
                columns_ttl_forbidden.insert(col);
        if (old_metadata.hasSortingKey())
            for (const auto & col : old_metadata.getColumnsRequiredForSortingKey())
                columns_ttl_forbidden.insert(col);
        for (const auto & [name, ttl_description] : new_column_ttls)
        {
            if (columns_ttl_forbidden.count(name))
                throw Exception("Trying to set TTL for key column " + name, ErrorCodes::ILLEGAL_COLUMN);
        }
    }
    auto new_table_ttl = new_metadata.table_ttl;
    if (new_table_ttl.definition_ast)
    {
        for (const auto & move_ttl : new_table_ttl.move_ttl)
        {
            if (!getDestinationForMoveTTL(move_ttl))
            {
                String message;
                if (move_ttl.destination_type == DataDestinationType::DISK)
                    message = "No such disk " + backQuote(move_ttl.destination_name) + " for given storage policy.";
                else
                    message = "No such volume " + backQuote(move_ttl.destination_name) + " for given storage policy.";