message: Note about unique question names
diff: @@ -30,7 +30,12 @@ Use this approach if you want to add or remove survey elements at runtime.
  ### Define a Static Survey Model in JSON
  -Static survey models are specified by model schemas (JSON objects). For example, the following model schema declares a [page](https://surveyjs.io/Documentation/Library?id=pagemodel) that contains two [textual questions](https://surveyjs.io/Documentation/Library?id=questiontextmodel) and an expandable panel with two more textual questions. All survey elements have [names](https://surveyjs.io/Documentation/Library?id=questiontextmodel#name) that can be used to identify the elements in code. The panel and questions also have [titles](https://surveyjs.io/Documentation/Library?id=questiontextmodel#title) that are displayed on screen.
  +Static survey models are specified by model schemas (JSON objects). For example, the following model schema declares a [page](https://surveyjs.io/Documentation/Library?id=pagemodel) that contains two [textual questions](https://surveyjs.io/Documentation/Library?id=questiontextmodel) and an expandable panel with two more textual questions. All survey elements have [names](https://surveyjs.io/Documentation/Library?id=questiontextmodel#name) that can be used to identify the elements in code.
  +
  +> **Question names must be unique**
  +> Ensure that question names are unique. If you populate a question choices collection, ensure that a choice's `value` is unique.
  +
  +The panel and questions also have [titles](https://surveyjs.io/Documentation/Library?id=questiontextmodel#title) that are displayed on screen.
  ```js
  const surveyJson = {
  