AI-generated Key Takeaways
- 
          The content lists various Ad Manager API services with links to their respective ApiVersionError.Reasondocumentation for version v202508.
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          The ApiVersionError.Reasonenumeration includesUPDATE_TO_NEWER_VERSIONandUNKNOWNas possible reasons for API version errors.
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          UPDATE_TO_NEWER_VERSIONsignifies that the attempted operation is not permitted in the API version used for the request.
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          UNKNOWNindicates that the actual error value is not accessible in the requested API version.
- Namespace
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               https://www.google.com/apis/ads/publisher/v202508
| Enumeration | Description | 
|---|---|
| UPDATE_TO_NEWER_VERSION | Indicates that the operation is not allowed in the version the request was made in. | 
| UNKNOWN | The value returned if the actual value is not exposed by the requested API version. |