Domain poikhalyznamy.online is stuck assigned to a deleted project. Cannot reassign it to project last12.49. Getting error 400. Please manually release this domain.
The domain troubleshooting guide can help with most custom domain configuration issues. You might be able to use that guide to solve it before a human is available to help you. Then you can come back here and share the answer for bonus points.
You can also use v0 to narrow down the possibilities.
Hi Oleh,
One thing I’d check before assuming the domain is fully orphaned: the target project name last12.49 looks suspicious. Vercel project names/slugs generally use lowercase letters, numbers, and hyphens, so a dot in the project name can cause validation or lookup issues.
I’d first confirm the exact target project slug from:
Project Settings → General → Project Name
If the project is actually named last12.49, try renaming it to something like last12-49, then add the domain again.
After that, from the account/team that owns the domain, run:
vercel switch
vercel domains inspect poikhalyznamy.online
vercel domains ls --limit 100
vercel alias ls --limit 100
If domains inspect or alias ls still shows the domain attached somewhere, remove it from that project/deployment first. If it shows as existing but you cannot remove it because the old project is deleted, then it is probably an orphaned domain/alias that Vercel needs to release internally.
The project-name validation is listed in Vercel’s error docs here:
Can you share the exact 400 error text after checking the project slug?