Accidental Whatsapp privacy breach

I exported my chat history with my friend, JJ, to my Google drive. Somehow a chat history between JJ and someone else (Meg) was exported. I have no idea who Meg is and i have no record of her in Whatsapp or anywhere on my phone. I tried again and my chat with JJ was exported and saved. However,it did export Meg's a few more times as well. It seems very wrong that i have a stranger's chat history with my friend saved on my drive. Any ideas how this happened? I'm on Samsung Note 8.