I had a domain on Cloudflare (quantiumcode.pl) and now, when it expired, I bought it on ovhcloud.pl, but still, when I enter the address in the browser, a Cloudflare window pops up informing me that the domain is unavailable. I would like to ask you to remove the domain from your database.
What feature, service or problem is this related to?
If you don’t want the domain on Cloudflare, change the nameservers at your registrar to another DNS provider. It will delete from the Cloudflare account soon after.
Error 1000 means the A/AAAA records in the Cloudflare DNS point at Cloudflare IP addresses.