AI-generated Key Takeaways
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          This content describes an enum detailing possible request errors. 
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          Errors range from missing or malformed resource names and IDs to issues with pagination parameters. 
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          Other errors include invalid operations, immutable fields, too many mutate operations, and manager account restrictions. 
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          Errors related to API specific parameters like developer token, login customer ID, and summary rows are also listed. 
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          The enum also covers issues with RPC deadlines, unsupported API versions, and missing cloud projects. 
Enum describing possible request errors.
| Enums | |
|---|---|
| 
 | Enum unspecified. | 
| 
 | The received error code is not known in this version. | 
| 
 | Resource name is required for this request. | 
| 
 | Resource name provided is malformed. | 
| 
 | Resource name provided is malformed. | 
| 
 | Customer ID is invalid. | 
| 
 | Mutate operation should have either create, update, or remove specified. | 
| 
 | Requested resource not found. | 
| 
 | Next page token specified in user request is invalid. | 
| 
 | Next page token specified in user request has expired. | 
| 
 | Page size specified in user request is invalid. | 
| 
 | Setting the page size is not supported, and will be unavailable in a future version. | 
| 
 | Required field is missing. | 
| 
 | The field cannot be modified because it's immutable. It's also possible that the field can be modified using 'create' operation but not 'update'. | 
| 
 | Received too many entries in request. | 
| 
 | Request cannot be executed by a manager account. | 
| 
 | Mutate request was attempting to modify a readonly field. For instance, Budget fields can be requested for Ad Group, but are read-only for adGroups:mutate. | 
| 
 | Enum value is not permitted. | 
| 
 | The developer-token parameter is required for all requests. | 
| 
 | The login-customer-id parameter is required for this request. | 
| 
 | page_token is set in the validate only request | 
| 
 | return_summary_row cannot be enabled if request did not select any metrics field. | 
| 
 | return_summary_row should not be enabled for validate only requests. | 
| 
 | return_summary_row parameter value should be the same between requests with page_token field set and their original request. | 
| 
 | The total results count cannot be returned if it was not requested in the original request. | 
| 
 | Deadline specified by the client was too short. | 
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 | This API version has been sunset and is no longer supported. | 
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 | The Google Cloud project in the request was not found. |