Administrators who opted in to the first (early) wave deployment for System Center Configuration Manager current branch, version 1702, have an update available in the Updates and Servicing node of the Configuration Manager console. This update, made available on April 13, 2017, addresses important late-breaking issues that were discovered during the final release process for version 1702. This update does not apply to sites that update or install a copy of version 1702 that was downloaded after April 5, 2017.
For more information, including the issues fixed, please see the following:
4018732 – Update for System Center Configuration Manager version 1702, first wave (https://support.microsoft.com/kb/4018732)