A record issue, site IP is changed!

Hi,

My droplet IP is fixed since I ordered, and I have 3 sites under it, all the site the A record is the same droplet IP. Today I tried to renew the certificate with letsencrypt, 2 sites renewed, the third one got an error, after checking, the nslookup gives different IP than the one in the DNS of the droplet, A record is different.

So, I changed in the DNS, is that fine? But the letsencrypt still gives an error:

Type:   tls
   Detail: remote error: tls: handshake failure

   To fix these errors, please make sure that your domain name was
   entered correctly and the DNS A/AAAA record(s) for that domain
   contain(s) the right IP address. Additionally, please check that
   you have an up-to-date TLS configuration that allows the server to
   communicate with the Certbot client.

Thanks