Xperia changed name when i connect to PC via USB cable

[Guggsy]

I recently noticed that when I connect my Xperia 1 II to my PC it comes up as XQ-AT51 instead of Xperia 1 II. When I used to connect to my pc before it came up with Xperia 1 II, but now when i connect it shows XQ-AT51. I haven't changed any settings on my phone or PC. Can anyone tell me what might be the problem.

Otherwise the phone works normally as far as I can see. 

[Strampke]

XQ-AT42 (Dual SIM) (Japan; SIM-unlocked)
XQ-AT51 (Single SIM) (America, Europe)
XQ-AT52 (Dual SIM) (Asia exclude Japan and Mainland China)
XQ-AT72 (Dual SIM) (Mainland China)

Settings -> About phone -> Device name

Hope this helps.

[Guggsy]

I tried changing the model name, but it still shows up as XQ-AT51