If you just upgraded Ravada and want to go to a previous version follow these steps:
This may not be necessary, try to install first the previous Ravada version and see if everything works. Anyway if you want to restore the database you must have a backup file.
bash
mysql -u rvd_user -p ravada < ravada.sql
bash
sudo dpkg -i ravada_version.deb
bash
sudo systemctl restart rvd_back sudo systemctl restart rvd_front