When you upgrade MySql databases, migration is transparent. Oracle still requires the following manual steps if you want to preserve your database. Here is what to run on a command line on the database server. The -h parameter provides more information about these (for example dbevolve -h).
dbevolve -a -x
dbmigration -t -i
For Oracle migration, the license.xml is copied to /opt/dorado, but is not imported. This is therefore a manual step (the last one).
Answer “no” when prompted to rebuild the database during installation.