not sure if that index should be kept or if leave up to user to use soft delete - soft delete can break if readd product with same name/category after deleting

src/Model/Entity/Product.php

@@ -41,6 +41,6 @@ class Product extends Entity
         // entities
         'product_category' => false,
         'product_attributes' => true,
-        'product_category_variants' => false,
+        'product_category_variants' => true,
     ];
 }