Update app.py

app.py

@@ -14,7 +14,7 @@ from huggingface_hub import InferenceClient
 from langgraph.graph import StateGraph, END
 from langgraph.prebuilt import ToolNode
 from langchain_core.tools import tool
-from langgraph.checkpoint.sqlite import SqliteSaver
+from langgraph.checkpoint.sqlite.aio import AsyncSqliteSaver
 import gradio as gr
 from uuid import uuid4
 
@@ -213,7 +213,7 @@ builder.add_edge("generate_sql", "execute_sql")
 builder.add_edge("execute_sql", "refine")
 builder.add_edge("refine", END)
 
-memory = SqliteSaver("graph_checkpoint")
+memory = AsyncSqliteSaver.from_conn_string("graph_checkpoint.db")
 graph = builder.compile(checkpointer=memory)
 
 async def async_chatbot_response(question, model_name):