Dear AdWords API Developer (MCC ID XXXXXXXXXX),
You’re receiving this message because your AdWords API Developer account submitted 100% of your API requests to an outdated API version within the past seven days. AdWords API v201609 has been deprecated and will stop accepting requests starting 2nd OCT 2017.
Migrate to a current AdWords API version
To ensure full access to the AdWords API after this date, please migrate to a current version as soon as possible. To learn more about this change, including migration help, visit the AdWords API Developer Site.
If you have any questions about this upcoming change, please don't hesitate to contact our team via the AdWords API forum.