我正在尝试使用以下代码在 SuiteScript 中创建客户。

var customer = record.create({
    type: record.Type.CUSTOMER,
    isDynamic : true
}).setValue({
    fieldId : 'firstname',
    value   : eOrder.bill_firstname
}).setValue({
    fieldId : 'lastname',
    value   : eOrder.bill_surname
}).setValue({
    fieldId : 'email',
    value   : eOrder.customer_email.replace(/\s+/g, '')
}).setValue({
    fieldId : 'phone',
    value   : phoneNumber
}).setValue({
    fieldId : 'leadsource',
    value   : LEAD_SOURCE_ECOMM
});

var customerId = customer.save();

当脚本运行此行时，我收到以下错误。

{
    "type": "error.SuiteScriptError",
    "name": "SSS_MISSING_REQD_ARGUMENT",
    "message": "load: Missing a required argument: id",
    "stack": [
        redacted
    ],
    "cause": {
        "type": "internal error",
        "code": "SSS_MISSING_REQD_ARGUMENT",
        "details": "load: Missing a required argument: id",
        "userEvent": null,
        "stackTrace": [
            redacted
        ],
        "notifyOff": false
    },
    "id": "",
    "notifyOff": false,
    "userFacing": false
}

由于客户正在保存，我不明白为什么会出现加载错误？记录创建得很好，但由于这个错误，脚本无法继续？