XenForo i got this Accessed unknown getter 'verti_back' problem

[mc nabulsy]

Hello,

this server error appears in AP can you help fixing or knowing the resource of this error

InvalidArgumentException: Accessed unknown getter 'verti_back' on XF:Node[5] src/XF/Mvc/Entity/Entity.php:213
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#0 src/XF/Mvc/Entity/Entity.php(125): XF\Mvc\Entity\Entity->get('verti_back')
#1 internal_data/code_cache/templates/l2/s5/public/thread_view.php(571): XF\Mvc\Entity\Entity->offsetGet('verti_back')
#2 src/XF/Template/Templater.php(1655)...
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