What do you meant by next attempt? Are you considering to take admission by qualifying IAT examination next year? See you can wait as there are 3 rounds of counselling for IAT examination. You can use the option float in the lower to higher order of preference so if you have the IISER PUNE in higher order of preference then you can float this seat and if you get an upgrade in the next round this seat will be rejected else you can take admission.

To know more about the IAT counselling visit the link below:

https://engineering.careers360.com/articles/iiser-counselling

I hope this answer helps. All the very best for your future endeavors!