XF 1.2 Any idea what is causing this server error? Unknown column 'post.ip_id' in 'on clause'

[Stuart Wright]

Zend_Db_Statement_Mysqli_Exception: Mysqli prepare error: Unknown column 'post.ip_id' in 'on clause' - library/Zend/Db/Statement/Mysqli.php:77
Generated By: Stuart Wright, A moment ago
Stack Trace
#0 /home/sites/xf.avforums.com/public_html/sandbox/library/Zend/Db/Statement.php(115): Zend_Db_Statement_Mysqli->_prepare('????SELECT COUN...')
#1 /home/sites/xf.avforums.com/public_html/sandbox/library/Zend/Db/Adapter/Mysqli.php(381): Zend_Db_Statement->__construct(Object(Zend_Db_Adapter_Mysqli), '????SELECT COUN...')
#2 /home/sites/xf.avforums.com/public_html/sandbox/library/Zend/Db/Adapter/Abstract.php(478): Zend_Db_Adapter_Mysqli->prepare('????SELECT COUN...')
#3 /home/sites/xf.avforums.com/public_html/sandbox/library/Zend/Db/Adapter/Abstract.php(825): Zend_Db_Adapter_Abstract->query('????SELECT COUN...', Array)
#4 /home/sites/xf.avforums.com/public_html/sandbox/library/XenForo/Model/Thread.php(574): Zend_Db_Adapter_Abstract->fetchOne('????SELECT COUN...')
#5 /home/sites/xf.avforums.com/public_html/sandbox/library/XenForo/Model/Thread.php(637): XenForo_Model_Thread->countThreads(Array)
#6 /home/sites/xf.avforums.com/public_html/sandbox/library/XenForo/ControllerPublic/Forum.php(119): XenForo_Model_Thread->countThreadsInForum(82, Array)
#7 /home/sites/xf.avforums.com/public_html/sandbox/library/AVForums/AgeRestrictions/ControllerPublic/Forum.php(7): XenForo_ControllerPublic_Forum->actionForum()
#8 /home/sites/xf.avforums.com/public_html/sandbox/library/ModEss/ControllerPublic/Forum.php(22): AVForums_AgeRestrictions_ControllerPublic_Forum->actionForum()
#9 /home/sites/xf.avforums.com/public_html/sandbox/library/AVForums/CreateThreadText/ControllerPublic/Forum.php(7): ModEss_ControllerPublic_Forum->actionForum()
#10 /home/sites/xf.avforums.com/public_html/sandbox/library/AVForums/LimitThreads/ControllerPublic/Forum.php(7): AVForums_CreateThreadText_ControllerPublic_Forum->actionForum()
#11 /home/sites/xf.avforums.com/public_html/sandbox/library/AVForums/ModCheckpoint/ControllerPublic/Forum.php(14): AVForums_LimitThreads_ControllerPublic_Forum->actionForum()
#12 /home/sites/xf.avforums.com/public_html/sandbox/library/XenForo/FrontController.php(337): AVForums_ModCheckpoint_ControllerPublic_Forum->actionForum()
#13 /home/sites/xf.avforums.com/public_html/sandbox/library/XenForo/FrontController.php(134): XenForo_FrontController->dispatch(Object(XenForo_RouteMatch))
#14 /home/sites/xf.avforums.com/public_html/sandbox/index.php(13): XenForo_FrontController->run()
#15 {main}
Request State
array(3) {
["url"] => string(52) "http://xf.avforums.com/sandbox/forums/plasma-tvs.82/"
["_GET"] => array(0) {
}
["_POST"] => array(0) {
}
}

I realise it could be one of the 40+ addons we have. Any idea where to start looking?
Thanks

 

[Paul B]

I see a few add-ons listed in the trace:

AVForums/AgeRestrictions
ModEss
AVForums/CreateThreadText
AVForums/LimitThreads
AVForums/ModCheckpoint

 

[Jeremy]

Age restrictions. That's the last addon.

 

[Stuart Wright]

Through a process of elimination (disabling addons), I determined that it's this addon:
http://xenforo.com/community/resources/show-similar-threads-on-thread-creation.2050/
I was pretty sure last night that there was a problem with it. I'm positive, now.

 

[Jon W]

Seems to be a conflict with one of my add-ons, fixed here.

 

[Stuart Wright]

Thanks Jon