langgraph, checkpoint-postgres: propagate new versions in update_state (#1270)

* langgraph, checkpoint-postgres: propagate new versions in update_state

libs/checkpoint-postgres/langgraph/checkpoint/postgres/__init__.py

@@ -194,7 +194,6 @@ class PostgresSaver(BasePostgresSaver):
                     thread_id,
                     checkpoint_ns,
                     copy.pop("channel_values"),
-                    copy["channel_versions"],
                     new_versions,
                 ),
             )

libs/checkpoint-postgres/langgraph/checkpoint/postgres/aio.py

@@ -201,7 +201,6 @@ class AsyncPostgresSaver(BasePostgresSaver):
                     thread_id,
                     checkpoint_ns,
                     copy.pop("channel_values"),
-                    copy["channel_versions"],
                     new_versions,
                 ),
             )

libs/checkpoint-postgres/langgraph/checkpoint/postgres/base.py

@@ -150,14 +150,10 @@ class BasePostgresSaver(BaseCheckpointSaver):
         checkpoint_ns: str,
         values: dict[str, Any],
         versions: dict[str, str],
-        new_versions: Optional[dict[str, str]],
     ) -> list[tuple[str, str, str, str, str, bytes]]:
         if not versions:
             return []
 
-        if new_versions:
-            versions = new_versions
-
         return [
             (
                 thread_id,