AI-generated Key Takeaways
- 
          This document describes an enum for possible ad group ad errors. 
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          Errors include issues with labels, ads not found in ad groups, and operating on removed ads. 
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          Creating or updating deprecated ad types like text ads will result in errors. 
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          Errors can also occur due to empty fields or attempting multiple operations on the same ad within a single call. 
Enum describing possible ad group ad errors.
| Enums | |
|---|---|
| 
 | Enum unspecified. | 
| 
 | The received error code is not known in this version. | 
| 
 | No link found between the adgroup ad and the label. | 
| 
 | The label has already been attached to the adgroup ad. | 
| 
 | The specified ad was not found in the adgroup | 
| 
 | Removed ads may not be modified | 
| 
 | An ad of this type is deprecated and cannot be created. Only deletions are permitted. | 
| 
 | Text ads are deprecated and cannot be created. Use expanded text ads instead. | 
| 
 | A required field was not specified or is an empty string. | 
| 
 | An ad may only be modified once per call | 
| 
 | AdGroupAds with the given ad type cannot be paused. | 
| 
 | AdGroupAds with the given ad type cannot be removed. | 
| 
 | An ad of this type is deprecated and cannot be updated. Only removals are permitted. |