MediaWiki internal error.

Original exception: exception 'DBQueryError' with message 'A database error has occurred
Query: SELECT iw_url,iw_local,iw_trans FROM `interwiki` WHERE iw_prefix = 'swtor_guide'
Function: Title::getInterwikiLink
Error: 1146 Table 'wikidb.interwiki' doesn't exist (localhost)
' in /usr/share/mediawiki/includes/Database.php:844
Stack trace:
#0 /usr/share/mediawiki/includes/Database.php(799): Database->reportQueryError('Table 'wikidb.i...', 1146, 'SELECT iw_url,...', 'Title::getInter...', false)
#1 /usr/share/mediawiki/includes/Database.php(1244): Database->query('SELECT iw_url,...', 'Title::getInter...')
#2 /usr/share/mediawiki/includes/Title.php(420): Database->select('interwiki', Array, Array, 'Title::getInter...')
#3 /usr/share/mediawiki/includes/Title.php(1978): Title->getInterwikiLink('SWTOR_Guide')
#4 /usr/share/mediawiki/includes/Title.php(177): Title->secureAndSplit()
#5 /usr/share/mediawiki/includes/Wiki.php(89): Title::newFromURL('SWTOR_Guide:_A_...')
#6 /usr/share/mediawiki/index.php(59): MediaWiki->checkInitialQueries('SWTOR_Guide:_A_...', 'view', Object(StubObject), Object(WebRequest), Object(LanguageEt))
#7 {main}

Exception caught inside exception handler: exception 'DBUnexpectedError' with message 'Error in fetchObject(): Table 'wikidb.page' doesn't exist (localhost)' in /usr/share/mediawiki/includes/Database.php:973
Stack trace:
#0 /usr/share/mediawiki/includes/MessageCache.php(307): Database->fetchObject(false)
#1 /usr/share/mediawiki/includes/MessageCache.php(244): MessageCache->loadFromDB()
#2 /usr/share/mediawiki/includes/MessageCache.php(434): MessageCache->load()
#3 /usr/share/mediawiki/includes/GlobalFunctions.php(427): MessageCache->get('databaseerror', true, false)
#4 /usr/share/mediawiki/includes/GlobalFunctions.php(396): wfMsgGetKey('databaseerror', true, false, true)
#5 /usr/share/mediawiki/includes/Exception.php(43): wfMsgReal('databaseerror', Array)
#6 /usr/share/mediawiki/includes/Database.php(292): MWException->msg('databaseerror', 'Database error')
#7 /usr/share/mediawiki/includes/Exception.php(148): DBQueryError->getPageTitle()
#8 /usr/share/mediawiki/includes/Exception.php(116): MWException->htmlHeader()
#9 /usr/share/mediawiki/includes/Exception.php(134): MWException->reportHTML()
#10 /usr/share/mediawiki/includes/Exception.php(213): MWException->report()
#11 /usr/share/mediawiki/includes/Exception.php(256): wfReportException(Object(DBQueryError))
#12 [internal function]: wfExceptionHandler(Object(DBQueryError))
#13 {main}