DD890 Model name changed to DD860 after DDOS upgrade

Hi I recently upgraded our DD890 succesfully from DDOS 5.7.4 to 6.0.2 everything is fine except for a minor glitch where the unit now appears as a different model number. Is there insight on how to corrects this?

I believe this used to be a DD860 and some years ago it was promoted to a DD890 and the head was swapped. 

Thank you!!