Custom Visual doesn't work after I changed it.

   I downloaded a SankeyByBradSarsfield custom visual. 

   In order to learn, I changed some code based on this and create copied and updated version using "Dev Tools".

   Then I created several reports to PowerBI service.

   But finally, I got 4 Sankeyxxxxx.js files when I use IE F12 dev tools and these script all didn't work properly.

   Can anyone help me to resolve this?

   Remoe them or make the right one work.

Thanks.