Photo wrong thumbnail

In the Finder of my mac, it often happens that some photos in a folder are displaying wrong previews. The set of photos which have this problem is random and unpredictable: sometimes among 10 photos in a row there is one with a wrong thumbnail. The wrong thumbnail is always another photo in the same folder. Rebooting the machine does not help, which means the wrong information is stored somewhere. When I duplicate the photos (as an experiment), the new copy is OK.

I wonder if there is a way to force refreshing the thumbnails.