MediaWiki internal error.

Original exception: exception 'DBUnexpectedError' with message 'Unable to free MySQL result' in /home/encyclopedia/public_html/w/includes/db/Database.php:769
Stack trace:
#0 /home/encyclopedia/public_html/w/extensions/SemanticMediaWiki/includes/storage/SMW_SQLStore2.php(1963): Database->freeResult(false)
#1 /home/encyclopedia/public_html/w/extensions/SemanticMediaWiki/includes/storage/SMW_SQLStore2.php(1888): SMWSQLStore2->getSMWPageIDandSort('George_Kadis_(5...', 0, '', '', true)
#2 /home/encyclopedia/public_html/w/extensions/SemanticMediaWiki/includes/storage/SMW_SQLStore2_Queries.php(485): SMWSQLStore2->getSMWPageID('George_Kadis_(5...', 0, '')
#3 /home/encyclopedia/public_html/w/extensions/SemanticMediaWiki/includes/storage/SMW_SQLStore2_Queries.php(215): SMWSQLStore2QueryEngine->compileQueries(Object(SMWValueDescription))
#4 /home/encyclopedia/public_html/w/extensions/SemanticMediaWiki/includes/storage/SMW_SQLStore2.php(979): SMWSQLStore2QueryEngine->getQueryResult(Object(SMWQuery))
#5 /home/encyclopedia/public_html/w/extensions/SemanticMediaWiki/includes/SMW_QueryProcessor.php(297): SMWSQLStore2->getQueryResult(Object(SMWQuery))
#6 /home/encyclopedia/public_html/w/extensions/SemanticMediaWiki/includes/SMW_QueryProcessor.php(280): SMWQueryProcessor::getResultFromQuery(Object(SMWQuery), Array, Array, 2, 1, 'auto')
#7 /home/encyclopedia/public_html/w/extensions/SemanticMediaWiki/includes/SMW_QueryProcessor.php(265): SMWQueryProcessor::getResultFromQueryString('[[:George Kadis...', Array, Array, 2, 1)
#8 /home/encyclopedia/public_html/w/extensions/SemanticMediaWiki/includes/SMW_ParserExtensions.php(240): SMWQueryProcessor::getResultFromFunctionParams(Array, 2, 1, true)
#9 [internal function]: SMWParserExtensions::doShow(Object(Parser), 'George Kadis (5...', '?person-key-sab...')
#10 /home/encyclopedia/public_html/w/includes/parser/Parser.php(2813): call_user_func_array(Array, Array)
#11 /home/encyclopedia/public_html/w/includes/parser/Preprocessor_DOM.php(959): Parser->braceSubstitution(Array, Object(PPTemplateFrame_DOM))
#12 /home/encyclopedia/public_html/w/includes/parser/Parser.php(2713): PPFrame_DOM->expand(Object(PPNode_DOM))
#13 /home/encyclopedia/public_html/w/includes/parser/Preprocessor_DOM.php(959): Parser->braceSubstitution(Array, Object(PPTemplateFrame_DOM))
#14 /home/encyclopedia/public_html/w/includes/parser/Parser.php(2936): PPFrame_DOM->expand(Object(PPNode_DOM))
#15 /home/encyclopedia/public_html/w/includes/parser/Preprocessor_DOM.php(959): Parser->braceSubstitution(Array, Object(PPFrame_DOM))
#16 /home/encyclopedia/public_html/w/includes/parser/Parser.php(2632): PPFrame_DOM->expand(Object(PPNode_DOM), 0)
#17 /home/encyclopedia/public_html/w/includes/parser/Parser.php(875): Parser->replaceVariables('{{person-page}}')
#18 /home/encyclopedia/public_html/w/includes/parser/Parser.php(327): Parser->internalParse('{{person-page}}')
#19 /home/encyclopedia/public_html/w/includes/Article.php(3573): Parser->parse('{{person-page}}', Object(Title), Object(ParserOptions), true, true, 3792380)
#20 /home/encyclopedia/public_html/w/includes/Article.php(979): Article->outputWikiText('{{person-page}}')
#21 /home/encyclopedia/public_html/w/includes/Wiki.php(450): Article->view()
#22 /home/encyclopedia/public_html/w/includes/Wiki.php(63): MediaWiki->performAction(Object(OutputPage), Object(Article), Object(Title), Object(User), Object(WebRequest))
#23 /home/encyclopedia/public_html/w/index.php(118): MediaWiki->initialize(Object(Title), Object(Article), Object(OutputPage), Object(User), Object(WebRequest))
#24 {main}

Exception caught inside exception handler: exception 'DBUnexpectedError' with message 'Unable to free MySQL result' in /home/encyclopedia/public_html/w/includes/db/Database.php:769
Stack trace:
#0 /home/encyclopedia/public_html/w/extensions/SemanticForms/includes/SF_LinkUtils.inc(270): Database->freeResult(false)
#1 /home/encyclopedia/public_html/w/extensions/SemanticForms/includes/SF_LinkUtils.inc(280): SFLinkUtils::getCategoriesForArticle(Object(SkinMonoBook))
#2 /home/encyclopedia/public_html/w/extensions/SemanticForms/includes/SF_FormEditTab.php(25): SFLinkUtils::getFormForArticle(Object(SkinMonoBook))
#3 [internal function]: SFFormEditTab::displayTab(Object(SkinMonoBook), Array)
#4 /home/encyclopedia/public_html/w/includes/Hooks.php(117): call_user_func_array(Array, Array)
#5 /home/encyclopedia/public_html/w/includes/SkinTemplate.php(804): wfRunHooks('SkinTemplateTab...', Array)
#6 /home/encyclopedia/public_html/w/includes/SkinTemplate.php(437): SkinTemplate->buildContentActionUrls()
#7 /home/encyclopedia/public_html/w/includes/OutputPage.php(968): SkinTemplate->outputPage(Object(OutputPage))
#8 /home/encyclopedia/public_html/w/includes/Exception.php(159): OutputPage->output()
#9 /home/encyclopedia/public_html/w/includes/Exception.php(186): MWException->reportHTML()
#10 /home/encyclopedia/public_html/w/includes/Exception.php(284): MWException->report()
#11 /home/encyclopedia/public_html/w/includes/Exception.php(344): wfReportException(Object(DBUnexpectedError))
#12 [internal function]: wfExceptionHandler(Object(DBUnexpectedError))
#13 {main}