Database error

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A database query error has occurred. This may indicate a bug in the software.

[0e3ac88f23deabce2dee5663] /wiki/index.php?title=Special:LonelyPages Wikimedia\Rdbms\DBQueryError: A database query error has occurred. Did you forget to run your application's database schema updater after upgrading or after adding a new extension?

Please see https://www.mediawiki.org/wiki/Special:MyLanguage/Manual:Upgrading and https://www.mediawiki.org/wiki/Special:MyLanguage/Manual:How_to_debug for more information.

Error 1146: Table 'mediawiki.linktarget' doesn't exist
Function: SpecialLonelyPages::reallyDoQuery
Query: SELECT page_namespace AS `namespace`,page_title AS `title` FROM `page` LEFT JOIN `pagelinks` ON ((pl_namespace = page_namespace) AND (pl_title = page_title)) LEFT JOIN `linktarget` ON ((lt_namespace = page_namespace) AND (lt_title = page_title)) LEFT JOIN `templatelinks` ON ((tl_target_id=lt_id)) WHERE (pl_namespace IS NULL) AND page_namespace = 0 AND page_is_redirect = 0 AND (tl_from IS NULL) ORDER BY page_title LIMIT 51

Backtrace:

from /usr/share/mediawiki/includes/libs/rdbms/database/Database.php(1618)
#0 /usr/share/mediawiki/includes/libs/rdbms/database/Database.php(1602): Wikimedia\Rdbms\Database->getQueryException()
#1 /usr/share/mediawiki/includes/libs/rdbms/database/Database.php(1576): Wikimedia\Rdbms\Database->getQueryExceptionAndLog()
#2 /usr/share/mediawiki/includes/libs/rdbms/database/Database.php(952): Wikimedia\Rdbms\Database->reportQueryError()
#3 /usr/share/mediawiki/includes/libs/rdbms/database/Database.php(1711): Wikimedia\Rdbms\Database->query()
#4 /usr/share/mediawiki/includes/libs/rdbms/database/DBConnRef.php(103): Wikimedia\Rdbms\Database->select()
#5 /usr/share/mediawiki/includes/libs/rdbms/database/DBConnRef.php(326): Wikimedia\Rdbms\DBConnRef->__call()
#6 /usr/share/mediawiki/includes/specialpage/QueryPage.php(540): Wikimedia\Rdbms\DBConnRef->select()
#7 /usr/share/mediawiki/includes/specialpage/QueryPage.php(726): QueryPage->reallyDoQuery()
#8 /usr/share/mediawiki/includes/specialpage/SpecialPage.php(701): QueryPage->execute()
#9 /usr/share/mediawiki/includes/specialpage/SpecialPageFactory.php(1428): SpecialPage->run()
#10 /usr/share/mediawiki/includes/MediaWiki.php(316): MediaWiki\SpecialPage\SpecialPageFactory->executePath()
#11 /usr/share/mediawiki/includes/MediaWiki.php(904): MediaWiki->performRequest()
#12 /usr/share/mediawiki/includes/MediaWiki.php(562): MediaWiki->main()
#13 /usr/share/mediawiki/index.php(50): MediaWiki->run()
#14 /usr/share/mediawiki/index.php(46): wfIndexMain()
#15 {main}