1.8.9 to 2.1 webserver migration

Hi,
I tried to install Xibo 2.1.0 on my webserver (with xibo-cms-2.1.0 zip package) and chose to keep my old Database (used with Xibo 1.8.9) during installation process, hoping that it would upgrade the database structure. It looks that it didn’t work…
Is it possible to upgrade a 1.8.9 xibo database to a 2.1.0 database through phpmyadmin ?