how to update the element of object which is in array and that array is in object. Mongoose and NodeJS

I am trying to update the object which is in array and that array in object. I am using mongoose I have 2 schemas SlotTracker and Slot. I am adding slot in array. as following. this is my database.

[{
  "_id": {
    "$oid": "60a39e210976153090842b46"
  },
  "bookings": [
    {
      "_id": {
        "$oid": "60b8ac254006ed40604eac86"
      },
      "aDate": {
        "$date": "2021-06-12T00:00:00.197Z"
      },
      "aShift": "morning",
      "slotsAvailable": 3,
      "slotsBooked": 0
    },
    {
      "_id": {
        "$oid": "60b8ac384006ed40604eac9d"
      },
      "aDate": {
        "$date": "2021-06-14T00:00:00.197Z"
      },
      "aShift": "morning",
      "slotsAvailable": 3,
      "slotsBooked": 0
    }
  ],
  "courtID": 2,
  "__v": 0
},
{
  "_id": {
    "$oid": "60b7a9199f7c244f3c9053c4"
  },
  "bookings": [
    {
      "_id": {
        "$oid": "60b8ac604006ed40604eacb5"
      },
      "aDate": {
        "$date": "2021-06-12T00:00:00.197Z"
      },
      "aShift": "morning",
      "slotsAvailable": 6,
      "slotsBooked": 0
    },
    {
      "_id": {
        "$oid": "60b8ac6d4006ed40604eaccd"
      },
      "aDate": {
        "$date": "2021-06-13T00:00:00.197Z"
      },
      "aShift": "morning",
      "slotsAvailable": 6,
      "slotsBooked": 0
    }
  ],
  "courtID": 3,
  "__v": 0
}]

I am tring to change values of slotsBooked and slotsAvailale if they exist in booking array of that requested court. if it is not there in array of requested court then add new slot int array of that court.

schemas

• SlotTracker :

Schema({
courtId: {
        type: Number
    },
    bookings: {
        type: Array
    }
});

• Slot

Schema({
    aDate: {
        type: Date
    },
    aShift: {
        type: String
    },
    slotsAvailable: {
        type: Number
    },
    slotsBooked: {
        type: Number
    }
});

I want to change the slotAvailable and slotBooked if and only if that aDate and aShift matches with provided aDate and aSlot