Two item pictures?!

Hi,

my grid suddenly shows two thumbails per item, a larger one with link (which I don’t want), and a smaller one without link (which I want):

https://filmmusiconline.com/moringschneider/

My layout settings are
+Thumbnail
+Title
+Content

Any advice?

Thanks in advance,
Stefan

https://www.ads-software.com/plugins/post-grid/