diff --git a/lastleg-service/src/main/java/com/baiyue/lastleg/procurement/service/OverseasProcurementService.java b/lastleg-service/src/main/java/com/baiyue/lastleg/procurement/service/OverseasProcurementService.java
index 360e9832b..dc93177b3 100644
--- a/lastleg-service/src/main/java/com/baiyue/lastleg/procurement/service/OverseasProcurementService.java
+++ b/lastleg-service/src/main/java/com/baiyue/lastleg/procurement/service/OverseasProcurementService.java
@@ -417,6 +417,9 @@ public class OverseasProcurementService implements WalletResultHandler {
         } catch (NumberFormatException exception) {
             throw badRequest("purchaseWarehouseId must be a numeric overseas partner warehouse ID");
         }
+        // Keep the warehouse snapshot already frozen on a historical order. A later master-data
+        // deactivation must not block unrelated edits such as recording outbound details.
+        if (Long.toString(numericId).equals(order.getPurchaseWarehouseId())) return;
         var option = warehouseDirectory.required(numericId);
         order.setPurchaseWarehouseId(option.warehouseId());
         order.setPurchaseWarehouseName(option.warehouseName());
diff --git a/lastleg-service/src/test/java/com/baiyue/lastleg/procurement/service/OverseasProcurementServiceTest.java b/lastleg-service/src/test/java/com/baiyue/lastleg/procurement/service/OverseasProcurementServiceTest.java
index 6f6f69118..dc87b1865 100644
--- a/lastleg-service/src/test/java/com/baiyue/lastleg/procurement/service/OverseasProcurementServiceTest.java
+++ b/lastleg-service/src/test/java/com/baiyue/lastleg/procurement/service/OverseasProcurementServiceTest.java
@@ -177,6 +177,27 @@ class OverseasProcurementServiceTest {
         assertEquals("洛杉矶采购仓", order.getPurchaseWarehouseName());
     }
 
+    @Test
+    void unchangedHistoricalWarehouseDoesNotBlockUnrelatedEditsAfterDeactivation() {
+        OverseasProcurementOrder order = order(OverseasProcurementService.APPROVED, 100, 0);
+        order.setPurchaseWarehouseId("10");
+        order.setPurchaseWarehouseName("历史采购仓");
+        when(orders.lockNo("100", "HC1")).thenReturn(order);
+        when(orders.findNo("100", "HC1")).thenReturn(order);
+        when(histories.listOrder("100", 1L)).thenReturn(List.of());
+        ObjectMapper mapper = new ObjectMapper();
+        var request = new OverseasProcurementRequests.Update(0L, null, null, null, null,
+            null, mapper.getNodeFactory().textNode("10"), null,
+            null, null, null, null, null, mapper.getNodeFactory().textNode("更新出库信息"));
+
+        service.update("100", "HC1", "7", request);
+
+        assertEquals("10", order.getPurchaseWarehouseId());
+        assertEquals("历史采购仓", order.getPurchaseWarehouseName());
+        verify(warehouseDirectory, never()).required(10L);
+        verify(orders).updateById(order);
+    }
+
     @Test
     void customerOptionsAreDeduplicatedSnapshotsFromProcurementOrders() {
         OverseasProcurementOrder option = new OverseasProcurementOrder();