Hello, Etienne76.
As general advice I'd strongly recommend to play with K1 CP which fixes literally hundreds of bugs and to avoid K1R which hasn't be actively supported and developed for many years now. A great piece of modding that unfortunately introduces a fair share of bugs.
Said that, this is the topic for N-DReW25's alternative to K1R and your issue has not anything to do with that, from what I understand.
One thing you can do, I think is to save the game on Dantooine, unpack the .SAV file, edit the second Sharina out of the area's .git file and then repackage the .SAV file. That should fix the problem, but why it happened in the first place I wouldn't know. Have you installed other modifications?