At this wiki, I'm getting the following error message:
MWException from line 264 of /opt/mediawiki/1.33.0/includes/Revision/RevisionStore.php: Content model must be stored in the database for multi content revision migration.
when trying to run update.php for a MediaWiki 1.33 upgrade. The SQL in the database is from a 1.15.1 mediawiki
How can I upgrade this wiki properly or get update.php to run?