ETELEGRAM: 409 Conflict: terminated by other getUpdates request

[robertnicjoo]

Hi,

My bot does work on bot chat when we send message to it perfectly, but here is the issue:

When I send message in my channel (which my bot also is admin of that channel) I receive this error

error: [polling_error] {"code":"ETELEGRAM","message":"ETELEGRAM: 409 Conflict: terminated by other getUpdates request; make sure that only one bot instance is running"}

What I'm trying to do is:

When new user join to the channel my bot send message into channel such as

Welcome to {channel_name} channel {user_name}

How can I do that?