diff --git a/libs/langgraph/langgraph/constants.py b/libs/langgraph/langgraph/constants.py
index ac53718e1..f524de39f 100644
--- a/libs/langgraph/langgraph/constants.py
+++ b/libs/langgraph/langgraph/constants.py
@@ -119,7 +119,6 @@ RESERVED = {
     CONFIG_KEY_STREAM,
     CONFIG_KEY_STREAM_WRITER,
     CONFIG_KEY_STORE,
-    CONFIG_KEY_CHECKPOINT_MAP,
     CONFIG_KEY_RESUMING,
     CONFIG_KEY_TASK_ID,
     CONFIG_KEY_CHECKPOINT_MAP,