Unserialization failed: the string "a:1:{i:0;s:109:""Hax" is not in the list of possible values (Continent, Country, State, City, Local place) for this property.";}" was not understood.

Backtrace:

#0 [internal function]: SMWDIWikiPage::doUnserialize('a:1:{i:0;s:109:...')
#1 /home/yaron57/public_html/w/extensions/SemanticMediaWiki/includes/dataitems/SMW_DataItem.php(149): call_user_func(Array, 'a:1:{i:0;s:109:...')
#2 /home/yaron57/public_html/w/extensions/SemanticWatchlist/includes/SWL_PropertyChange.php(48): SMWDataItem::newFromSerialization(9, 'a:1:{i:0;s:109:...')
#3 /home/yaron57/public_html/w/extensions/SemanticWatchlist/includes/SWL_ChangeSet.php(113): SWLPropertyChange::newFromSerialization(Object(SMWDIProperty), 'City#0#', 'a:1:{i:0;s:109:...')
#4 /home/yaron57/public_html/w/extensions/SemanticWatchlist/api/ApiQuerySemanticWatchlist.php(48): SWLChangeSet::newFromDBResult(Object(stdClass))
#5 /home/yaron57/public_html/w/includes/api/ApiQuery.php(262): ApiQuerySemanticWatchlist->execute()
#6 /home/yaron57/public_html/w/includes/api/ApiMain.php(657): ApiQuery->execute()
#7 /home/yaron57/public_html/w/includes/api/ApiMain.php(321): ApiMain->executeAction()
#8 /home/yaron57/public_html/w/extensions/SemanticWatchlist/specials/SpecialSemanticWatchlist.php(266): ApiMain->execute()
#9 /home/yaron57/public_html/w/extensions/SemanticWatchlist/specials/SpecialSemanticWatchlist.php(80): SpecialSemanticWatchlist->getChangeSetsData(20, NULL)
#10 /home/yaron57/public_html/w/includes/SpecialPage.php(578): SpecialSemanticWatchlist->execute(NULL)
#11 /home/yaron57/public_html/w/includes/Wiki.php(251): SpecialPage::executePath(Object(Title))
#12 /home/yaron57/public_html/w/includes/Wiki.php(63): MediaWiki->handleSpecialCases(Object(Title), Object(OutputPage), Object(WebRequest))
#13 /home/yaron57/public_html/w/index.php(116): MediaWiki->performRequestForTitle(Object(Title), NULL, Object(OutputPage), Object(User), Object(WebRequest))
#14 {main}