Query warning at Luna PageList

[asika32764]

Using null as an array offset is deprecated, use an empty string instead. File: /xxx/windwalker/framework/packages/query/src/Concern/ReflectConcernTrait.php (line: 40)

caused by

        $selector->from(Page::class)
            ->leftJoin(
                Category::class,
                null, //<-- This
                'category.id',
                'page.category_id'
            );