When I save as a part, drawing or assembly, it deletes the field description in the file property page. How can I set SW18 in order to keep the father file's description?

Starting from an existing part, when I save it as another one, it deletes the "Description" field in the File property menu.

Can you help me on changing the set up of Solidwroks in order to let it keeping the father part's Description?

Thank you,

Vittorio 

SolidworksGeneral