Creating a new distribution certificate without revoking old ones

Im very new to this.I want to submit update of an app.My client forgot the password for the private key.so im going to generate a new distribution certificate and submitting to appstore.so will this create any issue?Also is it possible to create a new distribution certificate without revok开发者_StackOverflow社区ing old ones.Can any one help me on this.Thanks in advance.Any help is appreciated.

You can't create new distribution certificate without revoking old one.

Solution : Create new distribution certificate and then create new provisioning profile for same app identifier.Create build and upload to app store.Good Luck!!