diff --git a/src/views/perfManage/customTarget/index.vue b/src/views/perfManage/customTarget/index.vue
index 7c7e913b..3a627644 100644
--- a/src/views/perfManage/customTarget/index.vue
+++ b/src/views/perfManage/customTarget/index.vue
@@ -387,8 +387,10 @@ function fnModalOk() {
         message.error(t('views.perfManage.customTarget.expressionNoIdTip'), 3);
         return false;
       }
-      modalState.from.expression = result;
-      const from = toRaw(modalState.from);
+      //modalState.from.expression = result;
+      //const from = toRaw(modalState.from);
+      const from = { ...toRaw(modalState.from) };
+      from.expression = result;
       //return false;
       modalState.confirmLoading = true;
       const perfTask = from.id ? updateCustom(from) : addCustom(from);