Strange g925f bootloop

I receive one g925f from one customer with baseband unknown issue on settings it was installed 5.1.1 firmware but on recovery it says 6.0.1 firmware i think this was the issue
So I flash this model with 5.1.1 know phone doesn’t boot stuck "Samsung S6 Edge" screen i flash kernel but stuck at s6 edge logo with kernel is not seandroid
Flash it with cf auto root so it was stuck at "recovery is not seandroid" not solve
Phone FRP was off
I think drk was failed
How to boot the phone please help me

Shahzaib Jahangir