message: Non-connected documents have to be existing documents
diff: @@ -9,7 +9,7 @@ export class NullDeltaConnection implements api.IDocumentDeltaConnection {
  public encrypted: boolean = false;
  public privateKey: string = null;
  public publicKey: string = null;
  - public existing: boolean = false;
  + public existing: boolean = true;
  public user: IAuthenticatedUser = null;
  constructor(public documentId: string, public parentBranch: string) {
  