Airpods wont unpair after replacement

Hi,

I received my right airpod (A3032) replacement yesterday and I've been trying to pair them ever since.

I realized that the problem is that I can't unpair my airpods from my devices. Even if I forget my airpods with my iphone and reset my network settings, if I pair them again to my phone, it'll still recognize them as mine.

What can I do to fix this?