Step 1. Move your bot to other channel (not by botjoinchannel command)
Step 2. Type /botjoinchannel <previous channel id>
Step 3. ...
Step 4. Profit
<15:35:25> "superuser": !botjoinchannel 25451
<15:35:25> "superbot": Bot is already in the given channel!
Step 2. Type /botjoinchannel <previous channel id>
Step 3. ...
Step 4. Profit
<15:35:25> "superuser": !botjoinchannel 25451
<15:35:25> "superbot": Bot is already in the given channel!