Duplicate tags

We have four different campuses which we designate with the “service-type” feature. So I’m using those specific urls for campus specific feeds. I’m also using a feedburner alternative called specific feeds. My issue is that the XML generated from Sermon Manager is creating duplicate <guid> tags. Enclosed in the tag is our home url http://newsongchurch.com and is repeated for each <item>. The feed URL from Sermon Manager is http://newsongchurch.com/sermons/service-type/central/feed and the URL from specific feeds is http://feeds.specificfeeds.com/newsongchurchcentral. Any help in getting our feed to validate would be greatly appreciated.

https://ww.wp.xz.cn/plugins/sermon-manager-for-wordpress/