Google DNS Record "Already In Use"

Hey everyone!

I was wondering how to solve this issue? I tried to add my new A records, but it appeared that they were already in use.

Upon further reading, I stumbled onto this other thread in which the resolution was to delete the Synthetic Records. I only have the “Connected via Domains Widget” available and the previous thread didn’t specify what to delete.

Any insight into this would be appreciated!

Here is my site Read-Only: LINK
(how to share your site Read-Only link)