K1 visa - previous divorce decree

Hi all,

I am worried / confused about the divorce decree. Lille bit of background about myself.
I am an Indian origin, currently living in Ireland. I received Irish citizenship through naturalization on 2015. My first marriage was on 2008 according to Indian marriage act before i came to Ireland. My ex was also Indian. She received Irish nationality through naturalization on 2014. On 2016 we divorced in India and received a divorce decree from Indian court. We filed the divorce there being Indian origins.
My new girlfriend is US citizen and she would like to apply K1 visa for me.

My question is - should I need an Irish divorce certificate for K1 application?
I have been divorced from India being an Indian origin. My current nationality is Ireland.

Your advise is highly appreciated. Thanks