备货订单的变更疑问

当lineItemChangeIndicator是u时，是更新所有lineItems的内容吗

{
  "order": {
    "orderNumber": "INSERT SUPPLIER ORDER NUMBER HERE",
    "checkoutProfileId": "INSERT CHECKOUT PROFILE ID HERE",
    "lineItems": [
      {
        "customerLineItemNumber": "1",
        "lineItemChangeIndicator": "U", // U ，跟新整个lineItems内容
        "tiPartNumber": "SN74LS00N",
        "customerAnticipatedUnitPrice": 0.202,
        "quoteNumber": "12345678",
        "customerCurrencyCode": "USD",
        "schedules": [
          {
            "requestedQuantity": 3000,
            "requestedDeliveryDate": "2025-05-01"
          }
        ]
      }
    ]
  }
}