Duh… I edited the book settings in a book of my own. It happens in Barcelona. When typing "Barcelona" a tooltip popped up as "Barcelona (Spain)" so I assumed that I was being told that is what I had to write. So I did. Now the book description states "Barcelona (Spain) (Spain)" as the setting. Trying to remove it in order to re-add it correctly gives me a red "ERROR try again".
Could anyone with permissions do it for me?