[SOLVED] upgrade to M7 fails

Dear All,
I wanted to upgrade my system to Mageia 7 but the installation was terminated by failure of electric power. Now, I can run only a quasi Mageia (very few applications installed, no internet access and so on). Is there a way to do upgrade without loosing data now?
thank you
Oliver
I wanted to upgrade my system to Mageia 7 but the installation was terminated by failure of electric power. Now, I can run only a quasi Mageia (very few applications installed, no internet access and so on). Is there a way to do upgrade without loosing data now?
thank you
Oliver