From c12c7583c85df8f2f4be839346d00e7e256ac628 Mon Sep 17 00:00:00 2001
From: Nuno Campos <nuno@langchain.dev>
Date: Wed, 17 Jan 2024 10:31:40 -0800
Subject: [PATCH] Fix tags

---
 langgraph/pregel/read.py | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/langgraph/pregel/read.py b/langgraph/pregel/read.py
index 2baea3fa9..0d566791f 100644
--- a/langgraph/pregel/read.py
+++ b/langgraph/pregel/read.py
@@ -16,6 +16,7 @@ from langchain_core.runnables.base import (
     RunnableEach,
     coerce_to_runnable,
 )
+from langchain_core.runnables.config import merge_configs
 from langchain_core.runnables.utils import ConfigurableFieldSpec
 
 from langgraph.channels.base import BaseChannel
@@ -103,7 +104,7 @@ class ChannelInvoke(RunnableBindingBase):
             when=when,
             bound=bound or default_bound,
             kwargs=kwargs or {},
-            config={**(config or {}), "tags": tags or []},
+            config=merge_configs(config, {"tags": tags}),
             **other_kwargs,
         )