Live and duplicates

I just ran through my first import. Unfortunately beets removed meta information like “(Live)” from the title. Now I am even getting a duplicate on a double album that has the same title twice. One being the studio, and one being the live version.
What’s the best way to handle this?

I wouldn’t mind keeping a standardized “(Live)” postfix on the titles. But a genre “live” might also be enough.

Is this information still available after the import?