To change the Telegram account linked to the Personal Account, use one of the following options:
First option
1. In your Personal Account, go to the "My Business" section, select the line with the connected Telegram personal.
2. In the opened window, click on the "setup" button.
3. Click "Unbind Authorization".
4. Connect Telegram again
Second option
1. In the Telegram desktop client, click the “Settings” button.
2. In the opened window, go to “Privacy and Security”.
3. Click the “Show all sessions".
4. Delete ChatApp session.
Third Option
- In the Telegram your phone, click the Settings button.
- In the window that opens, go to Devices.
- Delete session ChatApp.