Unique Identifier is not so unique, working with two Pi's

I have two Pi’s, one Pi0W and one Pi5.

The Pi0W is working fine and feeding with no issues and shows up on the stats page.

I wanted to experiment with another SDR stick, independent of the Pi0W, so I decided to get another Pi.

Problem is, I mistakenly assigned the Pi5 the same unique ID as the Pi0W, and I think this is the reason that I am unable to claim it on my stats page, as a second site.

I can see both Pi’s on the same local LAN, just fine. What is the best way to wipe out the (duplicate) unique ID on the Pi5? Or do I need to start over and re-install from scratch?

This post:

Pointed me in the right direction!
Thank you!