Foodkindl.org is managed by another team after deleting old team

Site name:
myfoodkindlapp

Netlify subdomain:
myfoodkindlapp dot netlify dot app

Custom domain:
foodkindl dot org

Registrar and current DNS provider:
Namecheap using Namecheap BasicDNS

Problem:
When I try to add my custom domain to my current Netlify project, I receive this error:

foodkindl.org or one of its subdomains is already managed by Netlify DNS on another team.”

The domain was previously connected to an older Netlify team. I deleted that team approximately one month ago, but the old Netlify DNS zone appears to remain associated with it.

I own the domain and have complete access to its Namecheap DNS settings.

Troubleshooting completed:

  • Deleted the previous Netlify team.
  • Confirmed the domain is in my Namecheap account.
  • Confirmed Namecheap BasicDNS is selected.
  • Tried adding the domain to my current Netlify project again.
  • The same error continues.

Requested assistance:
Please remove or release the old Netlify DNS zone so that I can add the domain to my current Netlify project.

I can verify ownership by adding a TXT record named verified-for-netlify through Namecheap. Please tell me the required verification value.