---
title: CNError.Code.clientIdentifierCollision
framework: contacts
role: symbol
role_heading: Case
path: contacts/cnerror/code/clientidentifiercollision
---

# CNError.Code.clientIdentifierCollision

An error that indicates a client identifier collision.

## Declaration

```swift
case clientIdentifierCollision
```

## See Also

### Errors

- [CNError.Code.authorizationDenied](contacts/cnerror/code/authorizationdenied.md)
- [CNError.Code.changeHistoryExpired](contacts/cnerror/code/changehistoryexpired.md)
- [CNError.Code.changeHistoryInvalidAnchor](contacts/cnerror/code/changehistoryinvalidanchor.md)
- [CNError.Code.changeHistoryInvalidFetchRequest](contacts/cnerror/code/changehistoryinvalidfetchrequest.md)
- [CNError.Code.clientIdentifierInvalid](contacts/cnerror/code/clientidentifierinvalid.md)
- [CNError.Code.clientIdentifierDoesNotExist](contacts/cnerror/code/clientidentifierdoesnotexist.md)
- [CNError.Code.communicationError](contacts/cnerror/code/communicationerror.md)
- [CNError.Code.containmentCycle](contacts/cnerror/code/containmentcycle.md)
- [CNError.Code.containmentScope](contacts/cnerror/code/containmentscope.md)
- [CNError.Code.dataAccessError](contacts/cnerror/code/dataaccesserror.md)
- [CNError.Code.featureDisabledByUser](contacts/cnerror/code/featuredisabledbyuser.md)
- [CNError.Code.featureNotAvailable](contacts/cnerror/code/featurenotavailable.md)
- [CNError.Code.insertedRecordAlreadyExists](contacts/cnerror/code/insertedrecordalreadyexists.md)
- [CNError.Code.noAccessableWritableContainers](contacts/cnerror/code/noaccessablewritablecontainers.md)
- [CNError.Code.parentContainerNotWritable](contacts/cnerror/code/parentcontainernotwritable.md)