Cannot negotiate ALPN protocol

Help
1

I have beta.domain.com

Almost everything works fine, but I have error related with domain www.beta.domain.com. There is no A record in DNS settings that’s why error occurs.

I don’t need www subdomain to resolve cert as this is beta temporary domain.
How to block resolving www.beta.subdomain.com?

2

You can’t: anyone can configure their DNS resolver to either remember old records, or to resolve that domain to your IP address.

3

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