Sub-domains Error

Help
1

I have installed the certificate on a Linux CentOS 7 server, in it I have consigado several sub-domains, when configuring a new sub-domain with an existing domain it installs but of the Common names error and shows me the certificate of the other sub-domain.

Ex:
New = erp.unilife.com.br (not working)
Already Existing = requests.unilife.com (that works)

Can I use the same certificate for orders.unilife.com.br for erp.unilife.com.br?

Thank you.

2

No, the certificate has an exact lists of FQDNs (“hostnames”) it is valid for. Any other FQDN will result in an error.

You should get a new certificate for the new hostnames. Either a separate one, or update an existing “lineage” of certificates (referred to by “certificate name” in certbot) to include the new hostnames.