G920T cant repair drk

I've flashed combination file bit 6
and when i try to repair drk with z3x i get this error


Operation: Repair DRK
Selected model: SM-G920T
Software version: 33.2

Checking local file... Listo
Buscando servidor... Listo
Compare local and server file... OK (up to date)
Searching USB Flash interface... COM13 detected
Configurar conexión ... Listo
Lectura de datos desde el teléfono ... Listo
Sending data to phone... Listo
Sending data to phone... Listo
Waiting ADB device... Listo
Leyendo información del teléfono ...
Recovery build version: 6.0.1
Boot version: FA50_G920TUVU6ARA1
Platform: exynos7420
Boot serial: 06157df62cda9512
Product board: zeroflte
Initialization zTool... Listo
Running zTool, please wait...
Start... Listo
Initialization... Listo
Generate and check client proof... Listo
Verify proof by client... Listo
Checking DRK status... Listo
Repairing DMVT key... error
Reiniciando teléfono ... Listo
Repair DRK done

Done with Samsung Tool PRO v.33.2


Please help