How Fix Error Duplicate ID hcard-YourID or The first occurrence of ID hcard-YourID was here in HTML5 blogspot

What do you have problem something like this in your blogger.?

How Fix Error Duplicate ID hcard-YourID or The first occurrence of ID hcard-YourID was here in HTML5 blogspot

This is very simple,you can change this code

<div class='vcard' id='hcard-YourID'> 

to like this

<div class='vcard' expr:id='data:post.timestamp'>

Then click save and review again in your HTML Validator or here validator.w3.org.
This is work on HTML5 in blogger and has been tested