AI-generated Key Takeaways
- 
          The document describes possible errors encountered during mutate operations. 
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          It lists various error types such as resource not found, resource already exists, and invalid field values. 
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          Errors related to using "validate_only" or "partial_failure" with incompatible resources are also included. 
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          It indicates errors can occur if a resource is mutated multiple times in one request or is not in Google Ads. 
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          The enum includes a general "UNKNOWN" error for codes not recognized in the current version. 
Enum describing possible mutate errors.
| Enums | |
|---|---|
| 
 | Enum unspecified. | 
| 
 | The received error code is not known in this version. | 
| 
 | Requested resource was not found. | 
| 
 | Cannot mutate the same resource twice in one request. | 
| 
 | The field's contents don't match another field that represents the same data. | 
| 
 | Mutates are not allowed for the requested resource. | 
| 
 | The resource isn't in Google Ads. It belongs to another ads system. | 
| 
 | The resource being created already exists. | 
| 
 | This resource cannot be used with "validate_only". | 
| 
 | This operation cannot be used with "partial_failure". | 
| 
 | Attempt to write to read-only fields. |