When I delete a classification field from a dynamic module (module builder) i am getting a error saying "You are trying to access item that no longer exists. The most probable reason is that it has been deleted by another user." and unable to access the site and sitefinity back-end also.
Please suggest me ASAP to solve the issue. We can't upgrade the site immediately since the site is live.
Please give us any database query or other solution ASAP and check the attachment for more information.