s7 root, knox tripped.

Platform: Samsung Android
Selected port: COM128
Selected model: SM-G935F
Connecting to server…
Connecting to server…Ok!
Checking resource files…
Resource files already downloaded.
Please put the phone into Download Mode and connect USB cable.
To put SM-G935F into Download Mode, You have to perform the following steps:
1. Reconnect the battery.
2. Press and hold "Volume-" + "Home" + "Power ON" keys.
3. When phone turns on, press "Volume+" key.
Waiting for phone…
Firmware write started.
Writing Boot section…
Boot section has been written successfully.
Phone is successfully rooted.
Performed by 2.3.0 software version

Phone was working with knox 0x0
Now stuck on boot with yellow samsung logo.
In download mode knox is 0x1

i will write firmware