Hello/Hi/Greetings,

When I change the thumbnails in the pwg_representative folder with files that have the same name as the old ones, the thumbnails in the gallery don't get updated. Instead, I need to go to _data/i/galleries and manually delete the thumbnails that are automatically generated by Piwigo from the pwg_representative in order for piwigo to create new thumbnails. I am sure I am missing something here though, because surely there must be an easy way to update the thumbnails?