Database error

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

[03e7f5f02b591faaf30d6002] /index.php?title=Special:UserLogin&returnto=AltgothicWiki%3APrivacy_policy 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 1054: Unknown column 'iw_api' in 'field list'
Function: MediaWiki\Interwiki\ClassicInterwikiLookup::load
Query: SELECT iw_prefix,iw_url,iw_api,iw_wikiid,iw_local,iw_trans FROM `interwiki` WHERE iw_prefix = 'altgothicwiki' LIMIT 1

Backtrace:

from /var/www/html/altgothic.com/public_html/wiki/includes/libs/rdbms/database/Database.php(1618)
#0 /var/www/html/altgothic.com/public_html/wiki/includes/libs/rdbms/database/Database.php(1602): Wikimedia\Rdbms\Database->getQueryException()
#1 /var/www/html/altgothic.com/public_html/wiki/includes/libs/rdbms/database/Database.php(1576): Wikimedia\Rdbms\Database->getQueryExceptionAndLog()
#2 /var/www/html/altgothic.com/public_html/wiki/includes/libs/rdbms/database/Database.php(952): Wikimedia\Rdbms\Database->reportQueryError()
#3 /var/www/html/altgothic.com/public_html/wiki/includes/libs/rdbms/database/Database.php(1711): Wikimedia\Rdbms\Database->query()
#4 /var/www/html/altgothic.com/public_html/wiki/includes/libs/rdbms/database/Database.php(1720): Wikimedia\Rdbms\Database->select()
#5 /var/www/html/altgothic.com/public_html/wiki/includes/libs/rdbms/database/DBConnRef.php(103): Wikimedia\Rdbms\Database->selectRow()
#6 /var/www/html/altgothic.com/public_html/wiki/includes/libs/rdbms/database/DBConnRef.php(344): Wikimedia\Rdbms\DBConnRef->__call()
#7 /var/www/html/altgothic.com/public_html/wiki/includes/interwiki/ClassicInterwikiLookup.php(278): Wikimedia\Rdbms\DBConnRef->selectRow()
#8 /var/www/html/altgothic.com/public_html/wiki/includes/libs/objectcache/wancache/WANObjectCache.php(1689): MediaWiki\Interwiki\ClassicInterwikiLookup->MediaWiki\Interwiki\{closure}()
#9 /var/www/html/altgothic.com/public_html/wiki/includes/libs/objectcache/wancache/WANObjectCache.php(1522): WANObjectCache->fetchOrRegenerate()
#10 /var/www/html/altgothic.com/public_html/wiki/includes/interwiki/ClassicInterwikiLookup.php(285): WANObjectCache->getWithSetCallback()
#11 /var/www/html/altgothic.com/public_html/wiki/includes/interwiki/ClassicInterwikiLookup.php(168): MediaWiki\Interwiki\ClassicInterwikiLookup->load()
#12 /var/www/html/altgothic.com/public_html/wiki/includes/libs/MapCacheLRU.php(274): MediaWiki\Interwiki\ClassicInterwikiLookup->MediaWiki\Interwiki\{closure}()
#13 /var/www/html/altgothic.com/public_html/wiki/includes/interwiki/ClassicInterwikiLookup.php(174): MapCacheLRU->getWithSetCallback()
#14 /var/www/html/altgothic.com/public_html/wiki/includes/interwiki/ClassicInterwikiLookup.php(144): MediaWiki\Interwiki\ClassicInterwikiLookup->fetch()
#15 /var/www/html/altgothic.com/public_html/wiki/includes/title/MediaWikiTitleCodec.php(438): MediaWiki\Interwiki\ClassicInterwikiLookup->isValidInterwiki()
#16 /var/www/html/altgothic.com/public_html/wiki/includes/Title.php(2985): MediaWikiTitleCodec->splitTitleString()
#17 /var/www/html/altgothic.com/public_html/wiki/includes/Title.php(432): Title->secureAndSplit()
#18 /var/www/html/altgothic.com/public_html/wiki/includes/Title.php(380): Title::newFromTextThrow()
#19 /var/www/html/altgothic.com/public_html/wiki/includes/specialpage/LoginSignupSpecialPage.php(183): Title::newFromText()
#20 /var/www/html/altgothic.com/public_html/wiki/includes/specialpage/LoginSignupSpecialPage.php(235): LoginSignupSpecialPage->load()
#21 /var/www/html/altgothic.com/public_html/wiki/includes/specialpage/SpecialPage.php(701): LoginSignupSpecialPage->execute()
#22 /var/www/html/altgothic.com/public_html/wiki/includes/specialpage/SpecialPageFactory.php(1428): SpecialPage->run()
#23 /var/www/html/altgothic.com/public_html/wiki/includes/MediaWiki.php(316): MediaWiki\SpecialPage\SpecialPageFactory->executePath()
#24 /var/www/html/altgothic.com/public_html/wiki/includes/MediaWiki.php(904): MediaWiki->performRequest()
#25 /var/www/html/altgothic.com/public_html/wiki/includes/MediaWiki.php(562): MediaWiki->main()
#26 /var/www/html/altgothic.com/public_html/wiki/index.php(50): MediaWiki->run()
#27 /var/www/html/altgothic.com/public_html/wiki/index.php(46): wfIndexMain()
#28 {main}