Hey there! Currently, each bookmark can only be stored *once*. That's actually really annoying if you are well-organized!
I am an academic teaching multiple courses each year. So I have a really well-structured bookmark folder structure. Since many courses are taught each year, some of the links remain the same (like online platforms that don't change each year). So of course these links should occur in *each* year (i.e., in multiple bookmark folders) and not just one of them.
So, please, allow websites (bookmarks) to occur in multiple folders!