How to trasfer defects logged on TFS 2013 to TFS 2018

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TFS

My organisation is currently moving on TFS 18 from TFS 13 and my main issue is that that how do i transfer my defects logged.
Both TFS13 and TFS18 will be on different server.

Can anyone post a different way other than the tried method?

Thank you

What I have tried:

I have tried following solution which doesn't seem to be working:
    
1. https://docs.microsoft.com/en-us/previous-versions/visualstudio/visual-studio-2008/ms253186(v=vs.90)
   

2. use TFS Integration tool, so you will be able to take all the historical, work items and etc.
http://visualstudiogallery.msdn.microsoft.com/eb77e739-c98c-4e36-9ead-fa115b27fefe