Can't Save - Archmage Rezo

[bugmenot]

The solution can be found here:
http://forum.1cpublishing.eu/showthread.php?t=13093

Simply kill all enemies before duelling the staff.

I've run into this error, too, and only then looked it up. That means I've wasted at least 2 hours of playtime after fighting the stupid staff since I didn't at first notice that save problem. Argh!!!