[Plugin: Google XML Sitemaps] Invalid URLS in sitemap?

Hi! my sitemap is at https://www.kataan.org/sitemap.xml. Google is complaining about invalid URLs, such as this one:

<url>
<loc>https://www.kataan.org/2002/21/</loc&gt;
<lastmod>2006-07-08T15:19:15+00:00</lastmod>
<changefreq>monthly</changefreq>
<priority>0.6</priority>
</url>

that doesn’t appear in my blog. I have permalinks set to /%year%/%postname%/

Any clues?

Thanks!

–k