Try this page I made to reset or remove the device:

https://developer.automationanywhere.com/deletedevice.php 

Hi ​@balu567 

Steps to Resolve "Unknown" Bot Status

1. Check Device Availability:

   • Go to Devices in the Control Room.
   • Ensure the device is connected and active.
   • If it's part of a device pool, make sure it's not overloaded or misconfigured.

2. Stop the Bot from Control Room:

   • Navigate to Activity > In Progress.
   • Locate the bot with "Unknown" status.
   • Click Stop or Move to History (if Stop is disabled) to clear the stuck instance 
     .

3. Restart Bot Agent Service:

   • On the machine where the bot is running, restart the Automation Anywhere Bot Agent service.
   • This often re-establishes the connection and updates the bot status.

4. Clear Device Lock:

   • If the device is locked due to a stuck bot, you may need to:
     • Unregister and re-register the device.
     • Or use the API to reset the device (available in Enterprise edition).

5. Check Logs:

   • Review logs in:
     • Node-manager
     • WebCR_Devices
     • Control Room Audit Logs
   • These can help identify if the issue is due to a script error, device timeout, or network issue.

6. Create a New Bot (Workaround):

   • If the bot remains stuck and cannot be stopped, create a new bot, copy the logic, and run it separately