AI-generated Key Takeaways
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          This content describes possible errors related to feed item targets, represented as an enum. 
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          Errors include issues like missing target fields on creation, existing targets, overlapping schedules, exceeding target limits, too many schedules per day, and duplicate ad schedules or keywords. 
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          A feed item cannot have both an enabled campaign target and an enabled ad group target. 
Enum describing possible feed item target errors.
| Enums | |
|---|---|
| 
 | Enum unspecified. | 
| 
 | The received error code is not known in this version. | 
| 
 | On CREATE, the FeedItemTarget must have a populated field in the oneof target. | 
| 
 | The specified feed item target already exists, so it cannot be added. | 
| 
 | The schedules for a given feed item cannot overlap. | 
| 
 | Too many targets of a given type were added for a single feed item. | 
| 
 | Too many AdSchedules are enabled for the feed item for the given day. | 
| 
 | A feed item may either have an enabled campaign target or an enabled ad group target. | 
| 
 | Duplicate ad schedules aren't allowed. | 
| 
 | Duplicate keywords aren't allowed. |