Trying to add my custom domain error- "Another site is already using this domain"

Hello all!
I am experiencing this issue when trying to add a custom domain for my project

The netlify site name for this project is tryhummingbird.netlify.app and the domain name is hummingbird.works. I just got this from GoDaddy, i’ve gone ahead to change the nameservers to netlify’s on GoDaddy’s end but this error still persists.

My intuition is that this domain name is in use somewhere on the netlify site.

What can I do to resolve this?

so hummingbird.works loads for me, but it doesn’t have an SSL certificate associated with it. Did you issue a SSL cert?