You may need to replace the certificates in the following scenarios:
The existing certificates expire.
An error occurs when adding a certificate to Server Load Balancer due to invalid private keys. In this case, you must replace the certificate with a valid one.
Create and upload the new certificate.
Configure the new certificate in the HTTPS listener.
For details, see Configure HTTPS listeners.
On the Certificate Management page, find the target certificate, and then click Delete.
Click Confirm to delete the old certificate.