[Python] TELETHON Server sent a very old message with ID

I am working on a Python script. To call a specific function, I need to read the last message from a Telegram group chat once an hour.

The first time I run the script, I don’t get any errors. However, in subsequent hours, I start seeing errors like the ones below. I get many of them, but here is one example:

WARNING:telethon.network.mtprotostate:Server sent a very old message with ID XXXXXXXXXX, ignoring (see FAQ for details)
WARNING:telethon.network.mtprotosender:Security error while unpacking a received message: Too many messages had to be ignored consecutively
WARNING:telethon.network.mtprotostate:Server sent a very old message with ID XXXXXXXXXXX, ignoring (see FAQ for details)


Should I ignore these messages and treat them as normal warnings, or should I change the implementation?

P.S. : I clear the session_name.session file before running the script. I also tried using different operating systems (Ubuntu and Windows 10) to check for a possible system time issue.

I initialize my Telegram client and then call the retrieveMessage function:

self.loop = asyncio.get_event_loop()
self.loop.run_until_complete(init_telegram())


last_msg = self.loop.run_until_complete(retrieveMessage())

Telegram class here:

from telethon import TelegramClient
import asyncio
import os
from dotenv import load_dotenv

load_dotenv()
# ---- CONFIG ----
API_ID = os.getenv("API_ID")
API_HASH = os.getenv("API_HASH")
PHONE_NUMBER = os.getenv("PHONE")
GROUP_NAME = os.getenv("GROUP_NAME")


telegram_client = TelegramClient('session_name', API_ID, API_HASH)

async def init_telegram():
await telegram_client.start(PHONE_NUMBER)
print("[INFO] Telegram client started and connected.")


async def retrieveMessage():
try:
group = await telegram_client.get_entity(GROUP_NAME)
messages = await telegram_client.get_messages(group, limit=1)
if messages:
return messages[0].text
return None
except Exception as e:
print(f"Error retrieving message: {e}")
return None

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