“{wwwebtech.in} or one of its subdomains is already managed by Netlify DNS on another team.”

Why have you created a started a new topic instead of continuing the original topic you created to which @charlottechhum responded?

When you say

did you only remove it from the site or did you only or did you also remove it from the account under the team’s Domains page? If you didn’t do the latter that would explain why you are seeing the error.

Yes, it is immediate (I can tell you from experience.)