You may receive errors with your distribution certificates such as: 

"Your Distribution Certificate will no longer be valid in 30 days. To generate a new certificate, sign in and visit Certificates, Identifiers & Profiles."

"There was a problem generating your release app signing certificate: There is a problem with the request entity. You already have a current Distribution certificate or a pending certificate request"

How to Resolve? 

First, you can Clear Certificates on your Apple Developer Account:

Once done, you need to delete the current Signing Certificates and create new ones. You can refer to this Article for the complete steps on how to do it. 

Note: Any Live Apps will not be impacted by this new Certificate, but any existing test builds will need to be recreated.