Python Telethon
I need to receive messages from the channel
Error:

>>> client.get_message_history(-1001143136828)

Traceback (most recent call last):
File "messages.py", line 23, in 
    total, messages, senders = client.get_message_history(-1001143136828)
File "/Users/kosyachniy/anaconda/lib/python3.5/site-packages/telethon/telegram_client.py", line 548, in get_message_history
    add_mark=True
KeyError: 1143136828
Error in library
Need to update: pip install telethon --upgrade
Telethon How do I get channel messages?