Telethon (Telegram lib) giving me {Server sent a very new message with ID *********************, ignoring}

When I fast-run the code, it is executed properly, but when I try to run it a second time with a session, it gives me [Server sent a very new message with ID 90454444, ignoring].

from telethon import TelegramClient, sync
api_id = '*******'
api_hash = "***********"




# create a new Telegram client using your own API credentials

phone_number = '********'
client = TelegramClient('session_name', api_id, api_hash)

# try to load an existing session
if client.start():
    print('Session loaded successfully!')
else:
    # if no session is found, log in with the OTP and save the session
    client.send_code_request(phone_number)
    code = input('Enter the code: ')
    client.sign_in(phone_number, code)
    client.start()
    print('Session created successfully!')

# get the target chat or channel entity
entity = client.get_entity('******')

# get the list of messages
messages = client.get_messages(entity, limit=10)

# iterate over the messages and extract the desired information
for message in messages:
    print(f'{message.sender.username} ({message.date}): {message.text}')

# disconnect the client
client.disconnect()