Thread:Project:Support desk/Error tables in the database./reply

You could try running the script update.php in the folder maintenance/. This should update existing and create missing database tables.

For which extension is the table "smw_ids" there for? If the above does not help, see the installation instructions of this extension on how to create the table.

Finally you could also try updating the extension (might help, if the error happens after a MediaWiki update).