diff --git a/bms-back/bms-system/src/main/java/com/bms/price/service/impl/PrcOrderBillServiceImpl.java b/bms-back/bms-system/src/main/java/com/bms/price/service/impl/PrcOrderBillServiceImpl.java
index aa0fbed0..24dda9b7 100644
--- a/bms-back/bms-system/src/main/java/com/bms/price/service/impl/PrcOrderBillServiceImpl.java
+++ b/bms-back/bms-system/src/main/java/com/bms/price/service/impl/PrcOrderBillServiceImpl.java
@@ -1305,9 +1305,7 @@ public class PrcOrderBillServiceImpl implements IPrcOrderBillService
         bill.setDestPostcode(request.getDestPostcode());
         bill.setWarehouseCode(request.getWarehouseCode());
         bill.setOrderTime(request.getOrderTime());
-        bill.setOrderStatus(request.getOrderStatus());
-        bill.setBlPickup(request.getBlPickup());
-        bill.setPickupDate(request.getPickupDate());
+        applyUpstreamOrderStatus(bill, request);
         bill.setOrderRemark(request.getOrderRemark());
         bill.setProductCode(result.getProductCode());
         bill.setProductName(result.getProductName());
@@ -1695,15 +1693,20 @@ public class PrcOrderBillServiceImpl implements IPrcOrderBillService
         assertOrderBillEditable(orderBillMapper.selectPrcOrderBillByOrderNo(orderNo.trim()));
     }
 
-    private void assertOrderBillEditable(PrcOrderBill existed)
+    private boolean isAlreadyInArBill(PrcOrderBill existed)
     {
         if (existed == null || StringUtils.isEmpty(existed.getBillId()))
         {
-            return;
+            return false;
         }
         int billedFreightCount = incomeBillFeeMapper.countByBillIdAndArBillStatusAndFeeType(
             existed.getBillId(), ArIncomeBillFeeStatus.BILLED.getCode(), "BASIC_FREIGHT");
-        if (billedFreightCount > 0)
+        return billedFreightCount > 0;
+    }
+
+    private void assertOrderBillEditable(PrcOrderBill existed)
+    {
+        if (isAlreadyInArBill(existed))
         {
             throw new ServiceException(MessageUtils.message("price.bill.alreadyInArBill", existed.getOrderNo()));
         }
@@ -2424,7 +2427,12 @@ public class PrcOrderBillServiceImpl implements IPrcOrderBillService
         orderNo = orderNo.trim();
         request.setOrderNo(orderNo);
         PrcOrderBill existed = orderBillMapper.selectPrcOrderBillByOrderNo(orderNo);
-        assertOrderBillEditable(existed);
+        // Already in AR: still record fail + ORDER_STATUS; do not touch amounts/fees.
+        if (isAlreadyInArBill(existed))
+        {
+            persistFailedSnapshotWhenLocked(existed, request, billingFailStatus, errorMessage);
+            return;
+        }
         BigDecimal previousIncome = existed == null ? BigDecimal.ZERO : nz(existed.getIncomeTotal());
         PrcOrderBill bill = existed == null ? new PrcOrderBill() : existed;
         if (existed == null)
@@ -2464,9 +2472,7 @@ public class PrcOrderBillServiceImpl implements IPrcOrderBillService
         bill.setDestPostcode(request.getDestPostcode());
         bill.setWarehouseCode(request.getWarehouseCode());
         bill.setOrderTime(request.getOrderTime());
-        bill.setOrderStatus(request.getOrderStatus());
-        bill.setBlPickup(request.getBlPickup());
-        bill.setPickupDate(request.getPickupDate());
+        applyUpstreamOrderStatus(bill, request);
         bill.setOrderRemark(request.getOrderRemark());
         bill.setProductCode(request.getProductCode());
         bill.setProductName(request.getProductName());
@@ -2490,14 +2496,7 @@ public class PrcOrderBillServiceImpl implements IPrcOrderBillService
         bill.setSurchargeAmount(BigDecimal.ZERO);
         bill.setIncomeTotal(BigDecimal.ZERO);
         bill.setPayTotal(BigDecimal.ZERO);
-        bill.setBillingFailStatus(Integer.valueOf(billingFailStatus));
-        String failText = errorMessage == null ? "" : errorMessage.trim();
-        if (failText.length() > 1000)
-        {
-            failText = failText.substring(0, 1000);
-        }
-        bill.setErrorMessage(failText);
-        bill.setMatchMessage(failText);
+        applyBillingFailText(bill, billingFailStatus, errorMessage);
         if (StringUtils.isEmpty(bill.getRefundStatus()))
         {
             bill.setRefundStatus(BillRefundStatus.NONE.getCode());
@@ -2523,4 +2522,64 @@ public class PrcOrderBillServiceImpl implements IPrcOrderBillService
         }
         persistBillExt(bill, request.getUpstreamRow());
     }
+
+    /**
+     * Locked by AR bill: write fail status + upstream ORDER_STATUS only.
+     * Amounts / income fees stay untouched.
+     */
+    private void persistFailedSnapshotWhenLocked(PrcOrderBill bill, TmsPriceBillRequest request,
+        int billingFailStatus, String errorMessage)
+    {
+        applyUpstreamOrderStatus(bill, request);
+        if (request != null)
+        {
+            if (StringUtils.isNotEmpty(request.getTrackingNo()))
+            {
+                bill.setTrackingNo(request.getTrackingNo());
+            }
+            if (StringUtils.isNotEmpty(request.getTransferNo()))
+            {
+                bill.setTransferNo(request.getTransferNo());
+            }
+        }
+        applyBillingFailText(bill, billingFailStatus, errorMessage);
+        orderBillMapper.updatePrcOrderBill(bill);
+        if (request != null)
+        {
+            persistBillExt(bill, request.getUpstreamRow());
+        }
+    }
+
+    /** Prefer request status fields; never clear existing order_status with null. */
+    private static void applyUpstreamOrderStatus(PrcOrderBill bill, TmsPriceBillRequest request)
+    {
+        if (bill == null || request == null)
+        {
+            return;
+        }
+        if (request.getOrderStatus() != null)
+        {
+            bill.setOrderStatus(request.getOrderStatus());
+        }
+        if (request.getBlPickup() != null)
+        {
+            bill.setBlPickup(request.getBlPickup());
+        }
+        if (request.getPickupDate() != null)
+        {
+            bill.setPickupDate(request.getPickupDate());
+        }
+    }
+
+    private static void applyBillingFailText(PrcOrderBill bill, int billingFailStatus, String errorMessage)
+    {
+        bill.setBillingFailStatus(Integer.valueOf(billingFailStatus));
+        String failText = errorMessage == null ? "" : errorMessage.trim();
+        if (failText.length() > 1000)
+        {
+            failText = failText.substring(0, 1000);
+        }
+        bill.setErrorMessage(failText);
+        bill.setMatchMessage(failText);
+    }
 }