When trying to replace a part of a tool that has the Aggresive Tactics modifier on it, the Table shows an error and if you try to take out the part or tool it gets duplicated.
If you move it with Shift you can even duplicate things multiple times.
Everything is fine if you have just Psionic on it, this only happens with Aggressive Tactics on there, too.
Attached I have a video on how to do it - it's in German sadly, but the visuals should be clear.
https://user-images.githubusercontent.com/23245821/106468134-d6200d80-649d-11eb-99a2-b84daf51050f.mp4