SW REV CHECK FAIL : Fused 1 > Binary 0 My mobile was stucked while updating android 7.0 . tried ODIN still it was stucked in bootloop. so i decided to downgrade it into 6.0 but in ODIN i am getting this error... how do i fix this?

I am having s6 Edge Plus SM-G928I
It happens sometimes after an update/update that the phone sticks into a bootloop if the data partition is not formatted. 
So to solve this, you simply need to reset your phone from the recovery menu.

Boot in to the recovery then perform a factory reset. The first boot may take some time, just wait. 

The error you are getting is because you are trying to downgrade which is not allowed by the bootloader.