[Collection] - Update Operation failed as the upsertId is not an integer

[clun]

Given this code:

Collection<Document> ccc = getCollection(true);
        ccc.insertOne(new Document("1")
              .append("isCheckedOut", true)
             .append("numberOfPages", 1)
             .append("color", "blue"));

Filter filter = Filters.and(
    Filters.eq("isCheckedOut", false),
    Filters.lt("numberOfPages", 10));
Update update = Updates.set("color", "yellow");
CollectionUpdateOneOptions options = new CollectionUpdateOneOptions().upsert(true);
CollectionUpdateResult result = ccc.updateOne(filter, update, options);
System.out.println(result.getMatchedCount());
System.out.println(result.getModifiedCount());
System.out.println(result.getUpsertedId());

we got an error because upsertIdis not an Integer and was read as one.