How to upgrade my MediaWiki site?
Upgrading an application is a tricky task and you should always perform it with caution.
The most important thing you need to know about application upgrades is that before attempting to upgrade an application, you should always create a backup of it.
To upgrade your MediaWiki, follow the instructions described in its documentation.
Many people, however, find it difficult to perform a script upgrade themselves. Fortunately, there are some hosting providers which offer application upgrades as an additional paid service. This way, if you don’t feel comfortable upgrading your MediaWiki yourself, you can have an expert upgrade it for you.