Update app.py

app.py

@@ -282,6 +282,9 @@ async def extract_text_from_mixed_pdf(file_path):
 @cl.on_chat_start
 async def on_chat_start():
     
+    # Clear previous session data
+    cl.user_session.clear()
+    
     files = None  # Initialize variable to store uploaded files
 
     # Wait for the user to upload a file