How to retrieve single data on relation using hasManyThrough Relationship

vouchers table:

| id  | code         |
| --- | ------------ |
| 1   | Y7Y0H0U4Q0H3 |
| 2   | F2H0I6V8V2I5 |
| 3   | A7N0R2K6E6A8 |
| 140 | I1D3C4Z1B9T9 |

bookings table:

| id   | status | created_at           |
| ---- | ------ | -------------------- |
| 1    | done   | 2022-01-10 00:00:00  |
| 2    | done   | 2022-01-10 00:00:00  |
| 3    | draft  | 2022-01-10 00:10:00  |
| 1221 | done   | 2022-01-10 00:14:00  |

bookings_discount table:

| id | booking_id | voucher_id |
| -- | ---------- | ---------- |
| 1  | 1 	      | null       |  
| 2  | 1 	      | 1          |
| 3  | 2 	      | 1          |
| 4  | 3 	      | 140        |
| 5  | 1221 	  | 140        |
| 6  | 1221 	  | 140        |

App/Models/Voucher.php

function bookings(): HasManyThrough
{
    return $this->hasManyThrough(Booking::class, BookingDiscount::class, 'voucher_id', 'id', 'id', 'booking_id')->orderBy('created_at', 'desc');
}

$voucher = Voucher::find(140);
return $voucher->load('bookings');

Getting a response like this when I call Voucher id - 140:

{
    "id": 140,
    "code": I1D3C4Z1B9T9
    "bookings": [        
        {
            "id": 1221,
            "status": "done",
            "created_at": "2022-01-10 00:14:00"

        },
        {
            "id": 1221,
            "status": "done",
            "created_at": "2022-01-10 00:14:00"
        },
        {
            "id": 3,
            "status": "draft",
            "created_at": "2022-01-10 00:10:00"
        }
}

Desired Result:

{
    "id": 140,
    "code": I1D3C4Z1B9T9
    "bookings": [
        {
            "id": 1221,
            "status": "done"
            "created_at": "2022-01-14 00:00:00"
        },
        {
            "id": 3,
            "status": "draft",
            "created_at": "2022-01-10 00:10:00"
        }
}