Existing devices to be autopiloted

I would like more information to better assist you, but generally, I would check the following:

1. Ensure the HWID is no longer registered in Windows devices for the same machine.
2. Check the allowed number of devices a user can enroll and verify that the limit has not already been exceeded.
3. If you're using Hybrid Azure AD join, run the command dsregcmd /status to review the device information.
4. As mentioned, if you're using Hybrid Azure AD join, check the status of the connectors to see if they are connected or if there are any errors.

Let me know if this helps or if you can provide additional details!