Thread:Project:Support desk/'invalid magic word 'rootpagename (2)/reply (2)

Maybe so, but after upgrade from 1.21.3 to 1.22.0 I get: [9f34ab5a] /index.php/Main_Page Exception from line 316 of /var/www/html/mediawiki-1.22.0/includes/MagicWord.php: Error: invalid magic word 'rootpagename'

I've simply downloaded mediawiki-1.22.0.tar.gz; expanded it into /var/www/html/mediawiki-1.22.0; copied LocalSettings.php and images from previous version; run php update.php in maintenance.