The web UI reports a DNS-zone conflict, but the REST API returns a different error for the same request:
PATCH /api/v1/sites/amitpaul-portfolio.netlify.app
{“custom_domain”:“www.amitpaul.pro.bd”}
→ 422 {“errors”:{“custom_domain”:[“is owned by another account”]}}
Identical result for the apex amitpaul.pro.bd. My account (amit-k5owjge) has zero DNS zones, so nothing on my side conflicts. Both checks are resolving .pro.bd down to pro.bd and testing that. Since .bd is a PSL wildcard (.bd), pro.bd is a public suffix and amitpaul.pro.bd is my registrable domain — it cannot be a subdomain of another team’s zone. DNS is fully live: apex A → 75.2.60.5, www CNAME → amitpaul-portfolio.netlify.app. Please release the pro.bd zone/ownership record blocking *.pro.bd.