Some Managed VM versions in GAE will be down on Nov 13th, 2017

[Yannick (Cloud Platform Support)]

Hello, 

Some Managed VM versions in Google App Engine will be down for maintenance on November 13, 2017 as scheduled. To keep your project available, please migrate (*) to the App Engine flexible environment. 

Sincerely, 

Google Cloud Platform Support 

(*) https://cloud.google.com/appengine/docs/flexible/python/upgrading