从空值到下拉选择值，不提示是否确定切换

@@ -387,11 +387,10 @@ const handleProductBaseFormSelectChange = (val, row, info) => {
     info.scenario = ''; //清空下应用场景
     setProductBaseFormItems(info);
   } else if (row.field == 'productName') {
-    // TODO， 带出资产登记的所有信息。更新产品登记名称
     transferRegistName();
     let da = val && registerCatalogList.value.find(r => r.guid == val);
     if (da) {
-      proxy.$openMessageBox("切换到其它产品后，当前修改会被重置，确定切换？", () => {
+      let exec = () => {
         oldProductName.value = info.productName;
         fullscreenLoading.value = true;
         getRegisterCatalogDetail(da.guid).then((res: any) => {
@@ -479,11 +478,18 @@ const handleProductBaseFormSelectChange = (val, row, info) => {
         }).catch(err => {
           fullscreenLoading.value = false;
         })
-      }, () => {
-        info.productName = oldProductName.value;
-        setProductBaseFormItems(info);
-        proxy.$ElMessage.info("已取消");
-      });
+      }
+      if (!oldProductName.value && val) {
+        exec();
+      } else {
+        proxy.$openMessageBox("切换到其它产品后，当前修改会被重置，确定切换？", () => {
+          exec();
+        }, () => {
+          info.productName = oldProductName.value;
+          setProductBaseFormItems(info);
+          proxy.$ElMessage.info("已取消");
+        });
+      }
     } else {
       oldProductName.value = info.productName;
     }