diff --git a/lib/protocoll_messages/start_session_message.dart b/lib/protocoll_messages/start_session_message.dart
index 8ab2946..da279d5 100644
--- a/lib/protocoll_messages/start_session_message.dart
+++ b/lib/protocoll_messages/start_session_message.dart
@@ -6,8 +6,6 @@ part 'start_session_message.g.dart';
 
 @JsonSerializable()
 class StartSessionMessage {
-  late String otto;
-
   StartSessionMessage();
 
   factory StartSessionMessage.fromJson(Map<String, dynamic> json) => _$StartSessionMessageFromJson(json);
diff --git a/lib/protocoll_messages/start_session_message.g.dart b/lib/protocoll_messages/start_session_message.g.dart
index 889c19e..e99df88 100644
--- a/lib/protocoll_messages/start_session_message.g.dart
+++ b/lib/protocoll_messages/start_session_message.g.dart
@@ -7,10 +7,8 @@ part of 'start_session_message.dart';
 // **************************************************************************
 
 StartSessionMessage _$StartSessionMessageFromJson(Map<String, dynamic> json) =>
-    StartSessionMessage()..otto = json['otto'] as String;
+    StartSessionMessage();
 
 Map<String, dynamic> _$StartSessionMessageToJson(
         StartSessionMessage instance) =>
-    <String, dynamic>{
-      'otto': instance.otto,
-    };
+    <String, dynamic>{};