On Monday, June 1, 2020, in accordance with the 
deprecation schedule, v201905 of the Ad Manager API will be sunset. At that time, any requests made to this version will return errors.
If you’re still using this version, now is the time to upgrade to the latest release and take advantage of new functionality like 
CustomPacingCurves on 
LineItem objects and 
performing actions on CMS Metadata Values.
When you’re ready to upgrade, check the 
release notes to identify any breaking changes, like 
Activity and 
ActivityGroup IDs 
changing from type int to type long in v202005. 
Then, grab the latest version of your client library and update your code. As always, don't hesitate to reach out to us on 
the developer forum with any questions.
 - Donovan McMurray, Ad Manager API Team
 - Donovan McMurray, Ad Manager API Team