I have a post for my site’s logo and I have inserted its thumbnail in my header.php using the code below and it works fine:

<div id="logo">
    <?php
    $my_query = new WP_Query('showposts=1&cat=12');

    while ($my_query->have_posts()):
    $my_query->the_post();
    $do_not_duplicate = $post->ID;?>

      <?php the_post_thumbnail( 'site-logo'); ?>
    <?php endwhile; ?>
</div>

Beside this I have a single.php file where I show the details of a post using Advanced Custom Fields plugin’s codes and my problem is when I click on a post and I get redirected to single.php instead of seeing its thumbnail and details I see the site’s logo and the details are empty.

This happened right after I added my logo as a post and used that post’s thumbnail. Before that my single.php page was functioning very well.

How can I fix this without removing the logo? (Or if this problem is because of inserting logo this way recommend me a better way.)

Thanks.

Read more here: My single.php page does not show the related data to the post which is clicked


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