Duplicate Server error after moving threads

[Smiggy]

Server Error

Undefined index: isIgnored

1. XenForo_Application::handlePhpError() in XenForo/ControllerPublic/Forum.php at line 147
2. XenForo_ControllerPublic_Forum->actionIndex() in ForumThreadBanning/Extend/ControllerPublic/Forum.php at line 4
3. ForumThreadBanning_Extend_ControllerPublic_Forum->actionIndex() in XenForo/FrontController.php at line 310
4. XenForo_FrontController->dispatch() in XenForo/FrontController.php at line 132
5. XenForo_FrontController->run() in /home/smiggy/public_html/index.php at line 13

I can no longer access the forum where these threads were ignored from.
Any temporary fix?

 

[Jake Bunce]

Duplicate:

http://xenforo.com/community/threads/undefined-index-isignored-when-viewing-forum.21712/

Though your error is slightly different in that it involves an addon called ForumThreadBanning. But it's probably the same bug.