How to delete hwd file in project of PLC Control Builder 4.1

Hello there,
Recently my customer replaced a new profibus device, and the communication of this device and AC800M controller can't be built up.
I used "GSD import tool" to convert the latest gsd file to hwd file.
And I tried to "Insert Hardware Definitions" for this device, but I encountered "Hardware Definition Duplicated" error message, and the new hwd file would be deleted automatically. And I had tried to manually remove the old hwd file from file explorer and delete this profibus device in PLC control builder. But after I tried to open this project again, it would showed the hwd file missing, and only allow me to open it after I added in the deleted hwd file back.

Could you please comment if anyone know how to solve the troublesome problem?

Thanks and best regards,
Bill Lee