TI-API: 变更订单结算信息报错No match found for customerPurchaseOrderNumber

尝试去变更订单的结算信息，得到如下报错

            "messages": [
                {
                    "code": "TI-TXT-067",
                    "type": "ERROR",
                    "reason": "No match found for customerPurchaseOrderNumber",
                    "message": "Customer purchase order number not found. Confirm your customer purchase order and resubmit your request. For help, contact TI API Support ">api-portal.ti.com/support"
                }