diff --git a/user_guide/src/examples/expressions/window.py b/user_guide/src/examples/expressions/window.py
index 9d7973d4..380b1598 100755
--- a/user_guide/src/examples/expressions/window.py
+++ b/user_guide/src/examples/expressions/window.py
@@ -5,6 +5,5 @@
     [
         pl.col("*"),  # 选择所有列
         pl.col("random").sum().over("groups").alias("sum[random]/groups"),
-        pl.col("random").list().over("names").alias("random/name"),
     ]
 )