Invalid value passed for salesorder_id

Hi,

I am using sales return API, details are given below:

API:

https://inventory.zoho.com/api/v1/salesreturns?organization_id=700571811

Post Json Data:

{
    "salesreturn_number": "",
    "date": "2020-11-12",
    "reason": "Testing from API",
    "line_items": [
        {
            "item_id": 2083011000002873023,
            "salesorder_item_id":  2083011000004669001,
            "quantity": 1,
            "non_receive_quantity": 1,
            "warehouse_id": 2083011000003214017
        }
    ]
}

When I hit this API I got an error:
{
    "code": 4,
    "message": "Invalid value passed for salesorder_id"
}

I checked sales order id, i found all details in post form is correct.
why i am getting this error.
Please help me out.

Thanks in advance.

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