ASUS DSL-AC68U - Free Certificate

Is there away for my certificate to be deleted, then reapply.
I have done a hard reset of my asus dsl-ac68u, manully install latest firmware as requested by ASUS support.
If I deregister with buf1957.asuscomm.com, create a new DDNS name will this work
still get the same error
Nov 8 17:00:13 kernel: /usr/sbin/acme-client: SSL_read return 5: Success
Nov 8 17:00:13 kernel: /usr/sbin/acme-client: https://acme-v01.api.letsencrypt.org/acme/new-reg: bad comm
Nov 8 17:00:13 kernel: /usr/sbin/acme-client: transfer buffer: [{ “6eTRQao1BMg”: “Adding random entries to the directory”, “key-change”: “https://acme-v01.api.letsencrypt.org/acme/key-change”, “meta”: { “caaIdentities”: [ “letsencrypt.org” ], “terms-of-service”: “https://letsencrypt.org/documents/LE-SA-v1.2-November-15-2017.pdf”, “website”: “https://letsencrypt.org” }, “new-authz”: “https://acme-v01.api.letsencrypt.org/acme/new-authz”, “new-cert”: "https://acme
Nov 8 17:00:18 kernel: /usr/sbin/acme-client: SSL_read return 5: Success
Nov 8 17:00:18 kernel: /usr/sbin/acme-client: https://acme-v01.api.letsencrypt.org/acme/new-authz: bad comm
Nov 8 17:00:18 kernel: /usr/sbin/acme-client: transfer buffer: [{ “6eTRQao1BMg”: “Adding random entries to the directory”, “key-change”: “https://acme-v01.api.letsencrypt.org/acme/key-change”, “meta”: { “caaIdentities”: [ “letsencrypt.org” ], “terms-of-service”: “https://letsencrypt.org/documents/LE-SA-v1.2-November-15-2017.pdf”, “website”: “https://letsencrypt.org” }, “new-authz”: “https://acme-v01.api.letsencrypt.org/acme/new-authz”, “new-cert”: "https://acme