Data-vocabulary.org schema deprecated Osclass Site

data-vocabulary.org schema deprecated”
I received email from GOOGLE WEBMASTER account warns about above given things.
What is it? Did someone also received such things?
What to do?

oc-includes/osclass/classes/Breadcrumb.php, breadcrumb HTML must be edited to comply with new Schema markup.

From my theme:

<nav class="bread bg-darker">
    <div class="container">
        <ol class="breadcrumb" itemscope itemtype="http://schema.org/BreadcrumbList">
            <?php $i = 0; ?>
            <?php foreach($data as $page) { ?>
                <?php $i++; ?>
                <li class="breadcrumb-item" itemprop="itemListElement" itemscope itemtype="http://schema.org/ListItem">
                    <a itemprop="item" href="<?php echo (array_key_exists('url', $page)) ? $page['url'] : '#'; ?>"><span itemprop="name"><?php echo $page['title']; ?></span></a>
                    <meta itemprop="position" content="<?php echo $i; ?>" />
                </li>
            <?php } ?>
        </ol>
    </div>
</nav>

Delete the text in the file and add this code ??