AI-generated Key Takeaways
- 
          LabelEntityAssociationError is an enumeration describing reasons for errors when associating labels with entities. 
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          Reasons for this error include duplicate associations, invalid associations, negation not allowed, and duplicate association with negation. 
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          An UNKNOWN value is returned if the actual value is not exposed by the requested API version. 
The reasons for the target error.
- Namespace
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               https://www.google.com/apis/ads/publisher/v202508
| Enumeration | Description | 
|---|---|
| DUPLICATE_ASSOCIATION | The label has already been attached to the entity. | 
| INVALID_ASSOCIATION | A label is being applied to an entity that does not support that entity type. | 
| NEGATION_NOT_ALLOWED | Label negation cannot be applied to the entity type. | 
| DUPLICATE_ASSOCIATION_WITH_NEGATION | The same label is being applied and negated to the same entity. | 
| UNKNOWN | The value returned if the actual value is not exposed by the requested API version. |