Domain blocked: "already managed by Netlify DNS on another team"

Netlify site name: posh-nonprofit-animal-transport (posh-nonprofit-animal-transport.netlify.app), under team “Posh Concierge Animal Transport” (info@poshanimaltransport.com).

Custom domain: poshnonprofittransport.org

I’m trying to add poshnonprofittransport.org as a custom domain to this project, but I get this error: “poshnonprofittransport.org or one of its subdomains is already managed by Netlify DNS on another team.”

I own this domain (registered through Namecheap, I’m the registrant). I’ve checked every Netlify account I have access to and none of them show this domain in their DNS Zones, so it appears to be locked under an old account I no longer have access to.

Can you please look up which account currently holds the DNS zone claim on this domain and release it, so I can add it to my current project? Happy to provide any proof of domain ownership needed.

Thank you,

Deborah Arnett