“在路径中发现太多位置（即'$'）元素”的解决方案是什么？

I have searched over the web for this issue, the conclusion where I have reached is that it is a bug in the latest version of mongo as told here and here

The problem is that the structure of the object is as following:

{
"_id": 2,
"status": 0,
"details": [{
    "id": 2,
    "category": "A",
    "obj": {
        "apple": 5,
        "banana": 2,
        "cherry": 10
    },
    "members": [{
            "id": 3,
            "category": "A",
            "obj": {
                "apple": 5,
                "banana": 2,
                "cherry": 10
            }
        },
        {
            "id": 4,
            "category": "A",
            "obj": {
                "apple": 5,
                "banana": 2,
                "cherry": 10
            }
        }
    ]
  }]
}

which I am using everywhere in my project which is almost ready. But now the requirement is to update the obj inside the members object. For which I tried

cond  := bson.M{ "$and": []bson.M{ bson.M{"details":bson.M{ "$elemMatch": bson.M{ "category": "A"} } }, bson.M{"status":0} } }
query := bson.M{ "$set": bson.M{ "details.$.members.$.obj.guava":15 } }
_, err := models.DbUpdateAll(Collection, cond, query)

But it is not working. Do I need to change the whole structure of the document by maintaining the array in different collection and passing reference to this object? It will be really a bad idea as for now where the project stands.... Isn't there any easy solution?