What Should I Do If My Private Key Is Lost?

For Private Key Managed in KPS

You can export the private key from KPS again.

For Private Key Not Managed in KPS

The private key cannot be retrieved.

You can bind a key pair to the ECS again by resetting the password or key pair. For details, see "How Do I Handle the Failure in Logging In to ECS After Unbinding the Key Pair?".