[GNC] Migration from 2.6 to 3.0 with mysql/mariadb

[Paul Neuwirth]

Hello,
I "accidently" upgraded to 3.0 and on startup, I got the message,
database was errernous or corrupted.
Could not see any corrosponding messages on console.
Using mariadb, working great with 2.6. 
I thought, when running 3.0 the first time database would be converted?

switching to 3.0 is planned after finishing some tax stuff this month.

maybe best way is backing up database, saving to xml, import to 3.0 and
save in (new) database again?

Thank you

Paul