编辑小程序二级标签，上级标签清空，点击【确定】，提示：系统未知错误，请反馈给管理员

flossom-ui/src/views/system/wechatTag/index.vue

@@ -289,6 +289,10 @@ export default {
         if (valid) {
           this.form.type = 1;
           if (this.form.id != undefined) {
+            if(this.form.parentId == null) {
+              this.$modal.msgError("请选择上级标签");
+              return;
+            }
             updateDept(this.form).then(response => {
               this.$modal.msgSuccess("修改成功");
               this.open = false;