From 826049b4dd11bcb006c6c8412634b3e05b130fbf Mon Sep 17 00:00:00 2001
From: Hassieb Pakzad <68423100+hassiebp@users.noreply.github.com>
Date: Thu, 19 Feb 2026 11:23:21 +0100
Subject: [PATCH] fix(experiments): remove dataset version from run item
 request if None

---
 langfuse/_client/client.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/langfuse/_client/client.py b/langfuse/_client/client.py
index c8782c638..ccb5e3cbf 100644
--- a/langfuse/_client/client.py
+++ b/langfuse/_client/client.py
@@ -2931,7 +2931,7 @@ async def _process_experiment_item(
                                 traceId=trace_id,
                                 observationId=span.id,
                                 datasetVersion=dataset_version,
-                            ),
+                            ).dict(exclude_none=True),
                         )
 
                         dataset_run_id = dataset_run_item.dataset_run_id