the region of my s7+ originally is CHN, which is for China.
it is the wifi version, so, theoritically, i can flash the tablet to any region.
and i noticed that except China, most region's tablet share the same multi-csc file.
so i download the rom of TGY and KOO.
but when after flashing and rebooting, every time the first time i reboot my device, it always asked me to choose a region of europe, and reboot to that region's csc status
the odin version is 3.14.1

i don't know what happened.