
I recently learned how to remove useless quest items!
So i had this problem where I had duplicate quest items and when I finished the quest a set of that will stay in my inventory that I couldn't remove because "i would need it later".
Also when I tried /fixquest it added quest items from old finished ones I reported the problem but also I tried for days to find a solution.
Now I won't keep you waiting here is the solution step by step:
1. Open your inventory and pick the quest item don't put it back just close the inventory.
3. Write /class to reload the game.
4. check your inventory and you will see that the item got removed.
I don't know if this is a common problem but I will post my complicated solution anyways hope this helps.