structered data error

hello there,
where is the file in plugin/system/t3/base-bs3/html/com_content/article.php
it contains some code on lines from 47 to 54 about

Header
<div class="item-page" itemscope itemptype="https://schema.org/Article">
Article
<Article itemscope itemptype="https://schema.org/Article">

Because of two itemscopes declarated for an article google
structured-data/testing-tool shows errors on page for both elements on page

Which one should be deleted ?

Is it ok to make so?
Header
<div class="item-page">
Article
<Article itemscope itemptype="https://schema.org/Article">

or Header
<div class="item-page" itemscope itemptype="https://schema.org/Article">
Article
<Article >

Try to remove it in article tag and keep it in the header.

that's exactly what did.
now it looks ok
It would be nice to include this in the update, so that you do not fix it later again