diff --git a/modules/i3plus-ext-mes-apiservice/src/main/java/cn/estsh/i3plus/ext/mes/apiservice/serviceimpl/base/MesWorkOrderService.java b/modules/i3plus-ext-mes-apiservice/src/main/java/cn/estsh/i3plus/ext/mes/apiservice/serviceimpl/base/MesWorkOrderService.java
index 8176698..9ef478b 100644
--- a/modules/i3plus-ext-mes-apiservice/src/main/java/cn/estsh/i3plus/ext/mes/apiservice/serviceimpl/base/MesWorkOrderService.java
+++ b/modules/i3plus-ext-mes-apiservice/src/main/java/cn/estsh/i3plus/ext/mes/apiservice/serviceimpl/base/MesWorkOrderService.java
@@ -705,7 +705,9 @@ public class MesWorkOrderService extends BaseMesService<MesWorkOrder> implements
                 item.setProductSeq(productSeq + 1);
                 item.setWorkOrderSeq(seqList.get(index));
             } else {
-                item.setProductSeq(Long.valueOf(item.getWorkOrderSeq()));
+                if (!StringUtil.isEmpty(item.getWorkOrderSeq())) {
+                    item.setProductSeq(Long.valueOf(item.getWorkOrderSeq()));
+                }
             }
 
             item.setSystemSyncStatus(CommonEnumUtil.TRUE_OR_FALSE.FALSE.getValue());