Can´t assign some keys to shortcuts

I guess this appeared in last version because I didn´t have problems before:
I had set ctrl+D to a shortcut but when hitting it I get a duplication action.
If some key combinations can´t be assigned to whatever I want they shouldn´t be available in Actions and shorcuts.

Tricky one. I think it should be such that when a shortcut such as Ctrl/D was assigned by the user already, the according edit action (Duplicate) should not have any shortcut assigned whatsoever, it will then be up to the user to assign another one.

sure.