An error indicating that the entire batch was rejected.
Mac Catalyst 13.0+
This error occurs when an operation attempts to save multiple items in a custom zone, but one of those items encounters an error. Because custom zones are atomic, the entire batch fails. The item(s) that cause the problem have their own errors, and all other items in the batch have a CKErrorBatchRequestFailed error to indicate that they weren't saved.
This error indicates that the associated item was not processed due to an error in another item in the operation. Check the other per-item errors under CKPartialErrorsByItemIDKey for any that aren't CKErrorBatchRequestFailed errors. Handle those errors, and then retry all items in the operation.