Remove Links to Image Attachment Pages?

I am in the process of revamping a website. For some reason when I migrated the site to a staging site on WP-engine, it created links for some of the existing images that are pointing to an old url: http://joansbolton.files.wordpress.com

Here is one of the blog entries on the current site:
https://santabarbaragardens.com/wp/blog/fall-planting-winter-vegetables/

And here is the code for one of the images (first image with a caption on the right):
<div id="attachment_859" style="width: 183px" class="wp-caption alignright"><img aria-describedby="caption-attachment-859" loading="lazy" src="http://joansbolton.files.wordpress.com/2010/10/dscf00011.jpg?w=173" alt="" title="DSCF0001" width="173" height="115" class="size-thumbnail wp-image-859" srcset="https://santabarbaragardens.com/wp/wp-content/uploads/2010/10/dscf00011.jpg 432w, https://santabarbaragardens.com/wp/wp-content/uploads/2010/10/dscf00011-300x200.jpg 300w" sizes="(max-width: 173px) 100vw, 173px" /></a>

These images do not have a hyperlink that takes you away from the page.

Here is that same blog entry on the staging site:
https://mysbgardens2.wpengine.com/blog/fall-planting-winter-vegetables/

You can see that same image now has a hyperlink:
http://joansbolton.wordpress.com/2010/10/05/fall-planting-winter-vegetables/dscf0001-2/

Here the code for that:
<figure id="attachment_859" aria-describedby="caption-attachment-859" style="width: 163px" class="wp-caption alignright"><a href="http://joansbolton.wordpress.com/2010/10/05/fall-planting-winter-vegetables/dscf0001-2/" rel="attachment wp-att-859"><img loading="lazy" src="http://joansbolton.files.wordpress.com/2010/10/dscf00011.jpg?w=173" alt="" title="DSCF0001" class="size-thumbnail wp-image-859" width="173" height="115"></a>

That link points to an old site that DOES take you to the old site which we don't want.

There are 82 instances of that url in the database. Is there a way to remove those links in the staging site?

I did find this article:
https://www.wpbeginner.com/wp-tutorials/how-to-disable-image-attachment-pages-in-wordpress/