I know it's an old bug but if someone find this like I did because I had the "A note with this title already exists", you may try to delete (make a copy first) the manifest.xml file in ~/.config/tomboy. It worked for me.
I know it's an old bug but if someone find this like I did because I had the "A note with this title already exists", you may try to delete (make a copy first) the manifest.xml file in ~/.config/tomboy. It worked for me.