I am relatively new to Darktable. I have used it for a while, then for a longer period I didn't.
I am struggling with importing photos. I have a folder which contains al my photos. There are subfolders for things like Family, Nature, Holidays. Each of those subfolders contains subfolders for specific series of photos (like a subfolder per holiday).
I once managed to import all that photos into Darktable. Now there is a new subfolder (let's call is Summer 2020) in the Holidays folder. I tried importing that, but the result was that in the Collect images module, the Holidays folder now only had the new Summer 2020 subfolder. All previously existing subfolders are now shown as subfolders of the Summer 2020, and their names are shown with a strike through font.
I then tried to import my photos folder again, assuming that Darktable would see the difference between new and existing photos. But as I am writing this, it is busy importing ALL photos. So I will end up with all exisiting Holiday photos twice.
How can I stop this from happening?
How can I remove the double photos?
How can I add new folders into Darktable without messing up the existing collection, and keeping the folder hierarchy intact?
The manual and some instruction videos I found did not give me the answer.