Thread:Project:Support desk/Mediawiki 1.21 Database errpr/reply

Hi!

downgrading won't help you, when you have a virus and want to get rid of it. Note that MediaWiki does not support downgrades. There is no code for that. I am pretty sure that the downgrade is at least a big part of your problem.

After a virus infection you have several options:


 * You can clean up your installation and continue using it. That way you will keep all data, because you just continue using the same DB. So if you already used MediaWiki 1.21, continue doing so. When you are lucky, this already solves the "Unknown column" error.
 * You can replace your installation with a backup from before the virus got into your system. That way you would loose changes, which were done in the meantime. However, that way you do not have the risk that you missed some parts of the virus and that your system in fact is still infected, which can happen in the option above.

I don't know if you could live with loosing the newest edits, but if I had the choice, I would go for option two. (Possibly you might still be able to save these changes by shortly updating the corrupted installation to MW 1.21 before you throw it away.)

In any case: Make sure that you know how the attacker got into your system so that you can close that hole. Otherwise you might get hacked again and again and loose time again and again.