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# CKPartialErrorsByItemIDKey

The key to retrieve partial errors.

```
let CKPartialErrorsByItemIDKey: String
```

## Discussion

The value of this key is a dictionary that maps an item ID to an error. The type of each ID depends on where the error occurs. For example, if you receive a partial error when modifying a record, the ID is an instance of [`CKRecord.ID`](/documentation/CloudKit/CKRecord/ID) that corresponds to the record that CloudKit can’t modify.

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