AI-generated Key Takeaways
- 
          The document lists and describes various errors that can occur with feed items. 
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          Errors include issues with attribute values, operations on removed items, date/time zones, and missing or duplicate key attributes. 
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          It also mentions errors related to invalid URLs, oversized attribute values, and read-only legacy feeds. 
Enum describing possible feed item errors.
| Enums | |
|---|---|
| 
 | Enum unspecified. | 
| 
 | The received error code is not known in this version. | 
| 
 | Cannot convert the feed attribute value from string to its real type. | 
| 
 | Cannot operate on removed feed item. | 
| 
 | Date time zone does not match the account's time zone. | 
| 
 | Feed item with the key attributes could not be found. | 
| 
 | Url feed attribute value is not valid. | 
| 
 | Some key attributes are missing. | 
| 
 | Feed item has same key attributes as another feed item. | 
| 
 | Cannot modify key attributes on an existing feed item. | 
| 
 | The feed attribute value is too large. | 
| 
 | Feed is read only. |