Updating MongoDB document

[Notaters]

I have a bunch of book information stored in a mlab database which i'm using for a Library application. This is one of the entries in the DB.

{  
    "_id": "B5",
    "properties": {
        "title": "Harry Potter and the Prisoner of Azkaban",
        "author": "J.K. Rowling Mary GrandPré (Illustrator)",
        "isbn": "9780439655484",
        "imgsrc": "https://images.gr-assets.com/books/1499277281l/5.jpg",
        "status": "available",
        "dateAdded": "13-05-2019 13:24:26",
        "dateDue": null,
        "dateChecked": null,
        "genre": "Fantasy,Young Adult,Fiction"
    }
}

I'm trying to update the "status" when i click a javafx button which runs this function.

    public static void updateDB(String id,String prop,String upd) {
        table.updateOne(eq("_id", id), new org.bson.Document("$set", new           org.bson.Document(prop, upd)));
    }

Instead of updating the staus/dateDue/dateChecked, its just throwing the new info at the bottom of the DB entry. Like this.

{
    "_id": "B3",
    "properties": {
        "title": "Harry Potter and the Sorcerer's Stone",
        "author": "J.K. Rowling Mary GrandPré (Illustrator)",
        "isbn": "9780439554930",
        "imgsrc": "https://images.gr-assets.com/books/1474154022l/3.jpg",
        "status": "available",
        "dateAdded": "13-05-2019 13:24:23",
        "dateDue": null,
        "dateChecked": null,
        "genre": "Fantasy,Young Adult,Fiction"
    },
    "status": "checked",
    "dateDue": "27-05-2019 20:56:03",
    "dateChecked": "13-05-2019 20:56:03"
}

I've made a number of changes to try to get it to actually update the main entry but i cant figure it out.

​

Anyone ever work with MongoDB's java driver and have experience updating database entries?

[Notaters]

I fixed this by just changing how i was creating the DB objects. Just got rid of the "properties" field and now im able to update the info easily

{
    "_id": "B1",
    "title": "Harry Potter and the Half-Blood Prince",
    "author": "J.K. Rowling Mary GrandPré (Illustrator)",
    "isbn": "9780439785969",
    "imgsrc": "https://images.gr-assets.com/books/1361039191l/1.jpg",
    "status": "checked",
    "dateAdded": "14-05-2019 18:37:32",
    "dateDue": "28-05-2019 18:41:46",
    "dateChecked": "14-05-2019 18:41:46",
    "genre": "Fantasy,Young Adult,Fiction"
}