Complete classification hierarchy shows up in part type

Hello,

I tried to find answers about this but it seems there isn't any? Hopefully that means that it is obvious ;-)

I've added a class-tree for parts as below example:

- PART
   -  MECHANICS
          -  FASTENERS
                  -  Screws

The issue is that if i create a new part, the part type then reflects this complete hierarchy (MECHANICS/FASTENERS/Screws) , instead of just showing "Screws" in the search grid.
Also, I use this class to build the part name, and don't want to have the complete hierarchy shown there.

Any suggestions?

Thanks /Benny