**How to reproduce**
Clickhouse version 21.5

```
cat /etc/clickhouse-server/users.xml
<?xml version="1.0"?>
<yandex>
    <!-- Profiles of settings. -->
    <profiles>
        <!-- Default settings. -->
        <default>
            <data_type_default_nullable>1</data_type_default_nullable>
            <load_balancing>random</load_balancing>
        </default>
....

2021.04.04 01:23:42.453678 [ 29048 ] {} <Error> Application: DB::Exception: Nested type Array(UInt64) cannot be inside Nullable type: Cannot attach table `system`.`crash_log` from metadata file /var/lib/clickhouse/metadata/system/crash_log.sql from query ATTACH TABLE system.crash_log (`event_date` Date, `event_time` DateTime, `timestamp_ns` UInt64, `signal` Int32, `thread_id` UInt64, `query_id` String, `trace` Array(UInt64), `trace_full` Array(String), `version` String, `revision` UInt32, `build_id` String) ENGINE = MergeTree ORDER BY (event_date, event_time) SETTINGS index_granularity = 8192: while loading database `system` from path /var/lib/clickhouse/metadata/system
```
kind_upper, create.table,
                            kind_upper, create.table,
                            kind_upper, create.table,
                            kind_upper, create.table);
        }
        generateUUIDForTable(create);
    }
    else
    {
        bool is_on_cluster = getContext()->getClientInfo().query_kind == ClientInfo::QueryKind::SECONDARY_QUERY;
        bool has_uuid = create.uuid != UUIDHelpers::Nil || create.to_inner_uuid != UUIDHelpers::Nil;
        if (has_uuid && !is_on_cluster)
            throw Exception(ErrorCodes::INCORRECT_QUERY,
                            "{} UUID specified, but engine of database {} is not Atomic", kind, create.database);
        
        create.uuid = UUIDHelpers::Nil;
        create.to_inner_uuid = UUIDHelpers::Nil;
    }
    if (create.replace_table)
    {
        if (database->getUUID() == UUIDHelpers::Nil)
            throw Exception(ErrorCodes::INCORRECT_QUERY,
                            "{} query is supported only for Atomic databases",
                            create.create_or_replace ? "CREATE OR REPLACE TABLE" : "REPLACE TABLE");
        UUID uuid_of_table_to_replace;
        if (create.create_or_replace)
        {
            uuid_of_table_to_replace = getContext()->tryResolveStorageID(StorageID(create.database, create.table)).uuid;
            if (uuid_of_table_to_replace == UUIDHelpers::Nil)
            {