[UPDATE] now my phone works, but still with that warning every startup.
I did flash the emmc. then after I used
flasher -f -F pr12image.bin --flash-only=cmt -v
then
flasher -f -F pr12image.bin --flash-only=nolo
then
flasher -f -F ,pr12image.bin --flash-only=kernel

but when I did the
flasher -f -F pr12image.bin --flash-only=rootfs

it gives error so I think my file is corrupted. (but I wonder how because I think hours before, I tried to flash the same image and I got it successful. so means not corrupted. oh well dont know why) so I just downloaded the rootfs again at it successfuly installed it.

But then, it still has this warning message every start up.