@Badal Ratra I ran into this yesterday when I created a new channel. It automatically created two wiki tabs. I started setting up the first wiki tab and then decided the other one was unnecessary so I removed it. Unfortunately when I removed it, it also removed all the data I had in the wiki that I had already set up. I had to recreated all the content of that wiki again. Luckily I hadn't gone very far and it was just a Proof of Concept that I was testing out. Beware, don't go too far before getting rid of the second wiki, and I would suggest not using it at all, instead, delete it and create a new one, if you need a second wiki.