On Tuesday, March 1, 2022, in accordance with the deprecation schedule , v202102 of the Ad Manager API will sunset. At that time, any requests made to this version will return errors.
If you’re still using v202102, now is the time to upgrade to a newer release and take advantage of additional functionality. For example, in v202105 and newer versions we added support for pushing creative previews  to linked devices .
When you’re ready to upgrade, check the full release notes  to identify any breaking changes. Here are a few examples of changes that may impact your applications:
v202105 
   v202108 
 On the MobileApplication object, the singular field appStore was changed to the list field appStores    
   
As always, don't hesitate to reach out to us on the developer forum  with any questions.