AI-generated Key Takeaways
- 
          
RequiredSizeError.Reason is an enumeration within the PublisherQueryLanguageService with three possible values:
REQUIRED,NOT_ALLOWED, andUNKNOWN. - 
          
The
REQUIREDreason indicates that a size is missing for either Creative or LineItem creative placeholders. - 
          
The
NOT_ALLOWEDreason signifies that the sizes specified in a LineItemCreativeAssociation are not a subset of the sizes defined in the associated LineItem's creative placeholders. - 
          
The
UNKNOWNreason is returned when the actual value of the error is not exposed in the requested API version. 
- Namespace
 - 
               
https://www.google.com/apis/ads/publisher/v202508 
| Enumeration | Description | 
|---|---|
                        REQUIRED
                      | 
                     Creative.size or LineItem.creativePlaceholders size is missing. | 
                        NOT_ALLOWED
                      | 
                     LineItemCreativeAssociation.sizes must be a subset of LineItem.creativePlaceholders sizes. | 
                        UNKNOWN
                      | 
                     The value returned if the actual value is not exposed by the requested API version. |