# SSL certificate provisioning fails - certificate parameter is required when updating an existing certificate

**URL:** <https://answers.netlify.com/t/ssl-certificate-provisioning-fails-certificate-parameter-is-required-when-updating-an-existing-certificate/165129>\
**Category:** Support\
**Tags:** netlify-dns-https-ssl\
**Created:** [July 14, 2026, 6:09am UTC](https://answers.netlify.com/t/ssl-certificate-provisioning-fails-certificate-parameter-is-required-when-updating-an-existing-certificate/165129 "2026-07-14T06:09:53Z")\
**Posts on this page:** 1\
**Page:** 1

<div class="post-metadata">

**Author:** ![Gyuwon\_Shim](https://sea1.discourse-cdn.com/netlify/user_avatar/answers.netlify.com/gyuwon_shim/32/67688_2.png) [@Gyuwon\_Shim](https://answers.netlify.com/u/Gyuwon_Shim)\
**Post date:** [July 14, 2026, 6:09am UTC](https://answers.netlify.com/t/ssl-certificate-provisioning-fails-certificate-parameter-is-required-when-updating-an-existing-certificate/165129/1 "2026-07-14T06:09:53Z")

</div>

Hello Netlify Support,

DNS verification is successful for my custom domain, but when I click “Provision certificate”, I receive the following error:

“certificate parameter is required when updating an existing certificate”

Could you please reset or clear the certificate state and reprovision the Let’s Encrypt certificate?

Site:  
unjungai.netlify.app

Custom domain:  
unjung.ai.kr

DNS verification is already successful.

Thank you.