Why am I getting thousands of the same picture upload with one of the sites only^

Very weird thing is happening with one of our websites. When we upload a media file, we see it about a thousand times in the media manager, without thumbnails though, except for one of them which has a thumbnail. Weird. One picture upload, thousands of files in the media manager.

I also get the top part where I chose list or grid, telling me I have 3k+ files, while the number next to the pages is showing me 1k+ pictures.

I'm hoping someone can help me with this :slight_smile:

Best regards,