Remove the netlify domain from here: Netlify App
If this does not work for you, please follow the instructions to verify domain ownership: [Support Guide] "another site is using this domain" Verifying domain ownership for Netlify custom domain
Remove the netlify domain from here: Netlify App
If this does not work for you, please follow the instructions to verify domain ownership: [Support Guide] "another site is using this domain" Verifying domain ownership for Netlify custom domain