Is there a hidden CID?

I've changed my CID to Supercid with "fastboot oem writecid 11111111"
In bootloader it seems to be OK, but the CID Getter app allways shows me my old CID.
Scrolling down the CID Getter i can see an "ro.cid" whith the old CID value.

In the One M7 there was an hidden CID, not easy to change. Maybe in M9 is too?