telepot ‘error_code’: 409

Traceback (most recent call last):
File "/usr/local/lib/python3.4/site-packages/telepot/async/__init__.py", line 343, in get_from_telegram_server
result = yield from self.getUpdates(offset=offset, timeout=20)
File "/usr/local/lib/python3.4/site-packages/telepot/async/__init__.py", line 266, in getUpdates
data=_rectify(p)))
File "/usr/local/lib/python3.4/site-packages/telepot/async/__init__.py", line 59, in _post
raise TelegramError(description, error_code, data)
telepot.exception.TelegramError: ('Conflict: terminated by other long poll or webhook', 409, {'error_code': 409, 'description': 'Conflict: terminated by other long poll
or webhook', 'ok': False})