On CDN Pro, each certificate is versioned, and each version is not editable once saved. You can deploy each version independently to the staging and production environments. There can be only one version deployed in each environment at any time. Deploying a new version replaces the old one automatically.
To update a CA certificate:
Upload a new chain certificate file. Click Save Version followed by OK at the confirmation pop-up.
Click the Deploy button and select Staging or Production.
To deploy the certificate now, click Deploy Now. To deploy it at a later time, click Add to Standby task to add this task to the standby queue.