letsencrypt issue

pi@KoiPi:~ $ sudo letsencrypt renew
Saving debug log to /var/log/letsencrypt/letsencrypt.log

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Processing /etc/letsencrypt/renewal/koishinorouter.ipdisk.co.kr.conf
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Cert is due for renewal, auto-renewing...
Plugins selected: Authenticator standalone, Installer None
Renewing an existing certificate
Performing the following challenges:
http-01 challenge for koishinorouter.ipdisk.co.kr
Waiting for verification...
Cleaning up challenges
Attempting to renew cert (koishinorouter.ipdisk.co.kr) from /etc/letsencrypt/renewal/koishinorouter.ipdisk.co.kr.conf produced an unexpected error: Failed authorization procedure. koishinorouter.ipdisk.co.kr (http-01): urn:ietf:params:acme:error:caa :: During secondary validation: CAA record for koishinorouter.ipdisk.co.kr prevents issuance. Skipping.
All renewal attempts failed. The following certs could not be renewed:
  /etc/letsencrypt/live/koishinorouter.ipdisk.co.kr/fullchain.pem (failure)

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All renewal attempts failed. The following certs could not be renewed:
  /etc/letsencrypt/live/koishinorouter.ipdisk.co.kr/fullchain.pem (failure)
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1 renew failure(s), 0 parse failure(s)

IMPORTANT NOTES:
 - The following errors were reported by the server:

   Domain: koishinorouter.ipdisk.co.kr
   Type:   None
   Detail: During secondary validation: CAA record for
   koishinorouter.ipdisk.co.kr prevents issuance