diff --git a/src/A2A.Server.AspNetCore/Services/A2AServer.cs b/src/A2A.Server.AspNetCore/Services/A2AServer.cs
index 10a5e8b..fc0021e 100644
--- a/src/A2A.Server.AspNetCore/Services/A2AServer.cs
+++ b/src/A2A.Server.AspNetCore/Services/A2AServer.cs
@@ -173,8 +173,6 @@ public async IAsyncEnumerable<StreamResponse> SendStreamingMessageAsync(SendMess
             logger.LogError($"Failed to cancel the task with id '{id}' because it is in an unexpected state '{task.Status}'", id, task.Status);
             throw new A2AException(ErrorCode.TaskNotCancelable, $"Failed to cancel the task with id '{id}' because it is in an unexpected state '{task.Status}'");
         }
-        task.History ??= [];
-        if (task.Status.Message != null) task.History.Add(task.Status.Message);
         task.Status = task.Status with
         {
             State = TaskState.Cancelled,