Diagnostic question for those who know things (C5)

[aerodynamica]

So I carried out a global test on the car yesterday while doing the suspension pipe work. Used the lexia to depressurise the system. There is a fault recorded in the suspension ecu that doesn't clear. Below is a picture of the fault description and it says "fault caused by another ECU" ??. Any ideas?

[GiveMeABreak]

Be advised that there are ghost faults with the X7 - specifically when interrogating the suspension or ESP ECUs when the vehicle is stationary.

[aerodynamica]

Hopefully it's only that!