diff --git a/libs/langchain/langchain/schema/runnable/base.py b/libs/langchain/langchain/schema/runnable/base.py
index abd7ae81c..1b8734ac7 100644
--- a/libs/langchain/langchain/schema/runnable/base.py
+++ b/libs/langchain/langchain/schema/runnable/base.py
@@ -1531,7 +1531,9 @@ class RunnableBinding(Serializable, Runnable[Input, Output]):
         copy = cast(RunnableConfig, dict(self.config))
         if config:
             for key in config:
-                copy[key] = config[key] or copy.get(key)
+                # Even though the keys aren't literals this is correct
+                # because both dicts are same type
+                copy[key] = config[key] or copy.get(key)  # type: ignore
         return copy
 
     def bind(self, **kwargs: Any) -> Runnable[Input, Output]:
diff --git a/libs/langchain/langchain/schema/runnable/config.py b/libs/langchain/langchain/schema/runnable/config.py
index e2274c134..d31c1f67b 100644
--- a/libs/langchain/langchain/schema/runnable/config.py
+++ b/libs/langchain/langchain/schema/runnable/config.py
@@ -112,8 +112,10 @@ def patch_config(
         # If we're replacing callbacks we need to unset run_name and run_id
         # As those should apply only to the same run as the original callbacks
         config["callbacks"] = callbacks
-        config["run_name"] = None
-        config["run_id"] = None
+        if "run_name" in config:
+            del config["run_name"]
+        if "run_id" in config:
+            del config["run_id"]
     if recursion_limit is not None:
         config["recursion_limit"] = recursion_limit
     if max_concurrency is not None: