Hello @Stoeffel
this looks like something/someone erased the definitions. They are not reinstalled, as they are in /etc/ and treated as configuration files. You can try running sudo apt-get -o Dpkg::Options::="--force-confmiss" install --reinstall evok-unipi-data and see if it helps. If not a deeper diagnosis will be needed.
It is not possible to copy them from 2.x the system was refactored.