Mi6 - find device storage corrupted your device is unsafe now

My Problem is like the under reference website. Please check the under first one reference website #3,062.

I have fixed the problem, but I don't know the root cause.

1. Install OmniRom(clean dalvik, cache, and internal).
2. Install magisk to root OS(clean dalvik, cache, and internal).
3. Boot to os and reboot to twrp.
4. Reinstall xiaomi.eu_multi_MI6_V10.3.1.0.OCACNXM_v10-8.0.zip.
5. Boot to OS and I find the problem is fixed.

Reference:
MIUI 10.0/10.1/10.2/10.3/10.4 STABLE RELEASE
[Discussion] find device storage corrupted your device is unsafe now
find device storage corrupted your device is unsafe now