**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
```
{
    ConstraintsDescription res;
    if (constraints)
        for (const auto & constraint : constraints->children)
            res.constraints.push_back(std::dynamic_pointer_cast<ASTConstraintDeclaration>(constraint->clone()));
    return res;
}
InterpreterCreateQuery::TableProperties InterpreterCreateQuery::setProperties(ASTCreateQuery & create) const
{
    TableProperties properties;
    TableLockHolder as_storage_lock;
    if (create.columns_list)
    {
        if (create.as_table_function && (create.columns_list->indices || create.columns_list->constraints))
            throw Exception("Indexes and constraints are not supported for table functions", ErrorCodes::INCORRECT_QUERY);
        if (create.columns_list->columns)
        {
            bool sanity_check_compression_codecs = !create.attach && !getContext()->getSettingsRef().allow_suspicious_codecs;
            properties.columns = getColumnsDescription(*create.columns_list->columns, getContext(), sanity_check_compression_codecs);
        }
        if (create.columns_list->indices)
            for (const auto & index : create.columns_list->indices->children)
                properties.indices.push_back(