**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
```
auto access = getContext()->getAccess();
        for (auto & elem : DatabaseCatalog::instance().getDatabases())
        {
            for (auto iterator = elem.second->getTablesIterator(getContext()); iterator->isValid(); iterator->next())
            {
                StoragePtr table = iterator->table();
                if (!table)
                    continue;
                if (!access->isGranted(getRequiredAccessType(action_type), elem.first, iterator->name()))
                {
                    LOG_INFO(
                        log,
                        "Access {} denied, skipping {}.{}",
                        toString(getRequiredAccessType(action_type)),
                        elem.first,
                        iterator->name());
                    continue;
                }
                if (start)
                {
                    manager->remove(table, action_type);
                    table->onActionLockRemove(action_type);
                }
                else
                    manager->add(table, action_type);
            }
        }
    }
}
InterpreterSystemQuery::InterpreterSystemQuery(const ASTPtr & query_ptr_, ContextPtr context_)