Canon 5D mark IV after CPS

grinbo

I'm New Here
Apr 26, 2019
20
2
Hello everyone. Two days ago i've received my camera from CPS after autofocus calibration. But strange things:
First - it is clear that some screws were unscrewed.
Second - on the contact for battery grip:
185187


Any ideas what is it? And why?
Is autofocus calibration process required disassembly device?