Fatal error: PHP notice in file /www/htdocs/v119885/2punkt0/forum/lib/data/board/Board.class.php (338): Undefined index: 48

Information:

error message: PHP notice in file /www/htdocs/v119885/2punkt0/forum/lib/data/board/Board.class.php (338): Undefined index: 48
error code: 0
file: /www/htdocs/v119885/2punkt0/forum/wcf/lib/system/WCF.class.php (255)
php version: 5.3.28-nmm1
wcf version: 1.0.11 pl 4 (Horizon)
date: Fri, 19 Dec 2014 03:58:47 +0000
request: /forum/index.php?page=Thread&postID=169736
referer:

Stacktrace:

#0 /www/htdocs/v119885/2punkt0/forum/lib/data/board/Board.class.php(338): WCF::handleError(8, 'Undefined index...', '/www/htdocs/v11...', 338, Array)
#1 /www/htdocs/v119885/2punkt0/forum/lib/data/board/Board.class.php(347): Board::inheritPermissions('6', Array)
#2 /www/htdocs/v119885/2punkt0/forum/lib/system/cache/CacheBuilderBoardPermissions.class.php(39): Board::inheritPermissions(0, Array)
#3 /www/htdocs/v119885/2punkt0/forum/wcf/lib/system/cache/CacheHandler.class.php(253): CacheBuilderBoardPermissions->getData(Array)
#4 /www/htdocs/v119885/2punkt0/forum/wcf/lib/system/cache/CacheHandler.class.php(188): CacheHandler->rebuild(Array)
#5 /www/htdocs/v119885/2punkt0/forum/wcf/lib/system/cache/CacheHandler.class.php(155): CacheHandler->load(Array)
#6 /www/htdocs/v119885/2punkt0/forum/lib/data/user/AbstractWBBUserSession.class.php(44): CacheHandler->get('boardPermission...')
#7 /www/htdocs/v119885/2punkt0/forum/wcf/lib/system/session/UserSession.class.php(64): AbstractWBBUserSession->getGroupData()
#8 /www/htdocs/v119885/2punkt0/forum/wcf/lib/data/DatabaseObject.class.php(22): UserSession->handleData(NULL)
#9 /www/htdocs/v119885/2punkt0/forum/wcf/lib/data/user/User.class.php(65): DatabaseObject->__construct(NULL)
#10 /www/htdocs/v119885/2punkt0/forum/wcf/lib/system/session/UserSession.class.php(31): User->__construct(NULL, NULL, NULL, NULL)
#11 /www/htdocs/v119885/2punkt0/forum/wcf/lib/system/session/CookieSessionFactory.class.php(39): UserSession->__construct()
#12 /www/htdocs/v119885/2punkt0/forum/wcf/lib/system/session/SessionFactory.class.php(71): CookieSessionFactory->create()
#13 /www/htdocs/v119885/2punkt0/forum/lib/system/WBBCore.class.php(170): SessionFactory->get()
#14 /www/htdocs/v119885/2punkt0/forum/wcf/lib/system/WCF.class.php(91): WBBCore->initSession()
#15 /www/htdocs/v119885/2punkt0/forum/global.php(18): WCF->__construct()
#16 /www/htdocs/v119885/2punkt0/forum/index.php(7): require_once('/www/htdocs/v11...')
#17 {main}