我有一个包含产品列表的目录集合，我想通过添加另一种产品来更新目录，问题是在产品目录集合中它删除了现有产品并保留了添加的产品，而在产品集合中它们仍然存在

@Document(collection = "catalog")
public class Catalog {

    @Id
    String id;
    String name;
    @DBRef
    List<Product> products;
}

@Document(collection = "product")
public class Product {

    @Id
    String id;
    Integer price;
}

    @Bean
    CommandLineRunner init(MongoOperations mongoOperations) {
        return args -> {
            // step 1
            List<Product> products1 = Arrays.asList(new Product().id("1").price(120),new Product().id("2").price(150));
            for (Product product : products1) {
                mongoOperations.save(product);
            }
            mongoOperations.save(new Catalog().id("55").name("Catalog 1").products(products1));

            // step 2
            List<Product> products2 = Arrays.asList(new Product().id("3").price(497));
            for (Product product : products2) {
                mongoOperations.save(product);
            }
            mongoOperations.save(new Catalog().id("55").name("Catalog 1").products(products2));
        };
    }