Ok.
- Dropping my existing index by clicking
Dropon expiresAt_1. Then clicking onCreate Indexon top right.
- Pasting
{ "expiresAt": 1 }, { expireAfterSeconds: 0 }inside Fields because there is already a placeholder there. Also, I read this article.
Oh is that so? Because this is what I was doing. I will retry this time by pasting inside options.

