Thread:Project:Support desk/Database error after updating MediaWiki from 1.5.2 to 1.6/reply (6)

I could solve the problem: Version 1.15 uses AdminSettings.php. 1.16 does not use this file. The parameters should go instead into LocalSettings.php. BUT: If AdminSettings.php is still present it will be used. I just renamed AdminSettings.php and put all parameters into LocalSettings.php. Then I was able to use "root" as $wgDBadminuser and $wgDBuser.