Issue: Undefined index: discussionid

Error Info
ErrorException: Undefined index: discussionid - library/vw/XenForo/AttachmentHandler/vwComment.php:142 
Generated By: Budgetadvisoryservice, 49 minutes ago

Stack Trace
#0 /library/vw/XenForo/AttachmentHandler/vwComment.php(142): XenForo_Application::handlePhpError(8, 'Undefined index...', '/home/...', 142, Array)
#1 /library/XenForo/AttachmentHandler/Abstract.php(147): vw_XenForo_AttachmentHandler_vwComment->_canUploadAndManageAttachments(Array, Array)
#2 /library/XenForo/ControllerPublic/Attachment.php(302): XenForo_AttachmentHandler_Abstract->canUploadAndManageAttachments(Array)
#3 /library/XenForo/ControllerPublic/Attachment.php(80): XenForo_ControllerPublic_Attachment->_assertCanUploadAndManageAttachments('604e03de85e0f19...', 'vwcomment', Array)
#4 /library/XenForo/FrontController.php(351): XenForo_ControllerPublic_Attachment->actionUpload()
#5 /library/XenForo/FrontController.php(134): XenForo_FrontController->dispatch(Object(XenForo_RouteMatch))
#6 /index.php(13): XenForo_FrontController->run()
#7 {main}
Request State
array(3) {
  ["url"] => string(382) "https://site.com/attachments/upload?hash=604e03de85e0f191745111597b270933&content_type=vwcomment&content_data[pageid]=12&content_data[areaid]=12&content_data[userid]=281763&&_xfRequestUri=%2Ftest4-xf-1%2Fwiki%2FFAQ%3Fdo%3Dcomments%26action%3Dposttalk&_xfNoRedirect=1&_xfToken=281763%2C1477322879%2C6b1403885d4ad135b00b9c2663523f1e9a8502a7&_xfResponseType=json"
  ["_GET"] => array(7) {
    ["hash"] => string(32) "604e03de85e0f191745111597b270933"
    ["content_type"] => string(9) "vwcomment"
    ["content_data"] => array(3) {
      ["pageid"] => string(2) "12"
      ["areaid"] => string(2) "12"
      ["userid"] => string(6) "281763"
    }
    ["_xfRequestUri"] => string(48) /wiki/FAQ?do=comments&action=posttalk"
    ["_xfNoRedirect"] => string(1) "1"
    ["_xfToken"] => string(58) "281763,1477322879,6b1403885d4ad135b00b9c2663523f1e9a8502a7"
    ["_xfResponseType"] => string(4) "json"
  }
  ["_POST"] => array(0) {
  }
}