Issue: Set cannot be called after preSave has been called.

XenForo_Exception: Set cannot be called after preSave has been called. - library/XenForo/DataWriter.php:626 
Generated By: Alfa, A moment ago

Stack Trace
#0 /vault/core/controller/dm/xf.php(237): XenForo_DataWriter->set('discussionid', 480, NULL)
#1 /vault/core/controller/ui/discussion/vw.php(1446): vw_DM_Controller_XF->set('discussionid', 480)
#2 /vault/core/controller/ui/discussion/vw.php(87): vw_UI_Discussion_Controller->posttalk()
#3 /vault/core/controller/ui/discussion/xf.php(72): vw_UI_Discussion_Controller->execute()
#4 /vault/core/view/ui/page/vw.php(278): vw_UI_Discussion_Controller_XF->execute()
#5 /vault/core/controller/ui/page/vw.php(755): vw_UI_Page_View->get_comments(Object(vw_UI_Page_Controller_XF), true)
#6 /vault/core/controller/ui/page/vw.php(175): vw_UI_Page_Controller->comments()
#7 /vault/core/controller/ui/page/xf.php(58): vw_UI_Page_Controller->execute()
#8 /vault/core/controller/ui/stack/vw.php(236): vw_UI_Page_Controller_XF->execute()
#9 /library/vw/XenForo/ControllerPublic/Wiki.php(68): vw_UI_Stack_Controller->execute()
#10 /library/XenForo/FrontController.php(351): vw_XenForo_ControllerPublic_Wiki->actionIndex()
#11 /library/XenForo/FrontController.php(134): XenForo_FrontController->dispatch(Object(XenForo_RouteMatch))
#12 /index.php(13): XenForo_FrontController->run()
#13 {main}
Request State
array(3) {
  ["url"] => string(76) "https://site.com/wiki/FAQ?do=comments&action=posttalk"
  ["_GET"] => array(2) {
    ["do"] => string(8) "comments"
    ["action"] => string(8) "posttalk"
  }
  ["_POST"] => array(14) {
    ["edittitle"] => string(18) "testing discussion"
    ["description"] => string(0) ""
    ["message_html"] => string(25) "<p>something here<br></p>"
    ["_xfRelativeResolver"] => string(72) "https://site.com/wiki/FAQ?do=comments&action=talk"
    ["parseurl"] => string(1) "1"
    ["attachment_hash"] => string(32) "87e3685af5ab0165fd5abcc1661bd9b6"
    ["posthash"] => string(0) ""
    ["poststarttime"] => string(0) ""
    ["notifytype"] => string(1) "0"
    ["sbutton"] => string(8) "Post Now"
    ["_xfToken"] => string(8) "********"
    ["do"] => string(8) "comments"
    ["action"] => string(8) "posttalk"
    ["loggedinuser"] => string(1) "1"
  }
}