G920W8, FIX DRK failed

Platform: Samsung Android
Selected port: COM1
Selected model: SM-G920W8
Operation: DRK Fix
Please, press "OK" button on the phone to allow USB debugging.
Please, press "OK" button on the phone to allow USB debugging.
Detected phone model: SM-G920W8
Firmware compiled date: Fri Jul 7 19:02:06 KST 2017
PDA version: G920W8VLS5DQG1
CSC version: G920W8OYA5DQG1
SW version: unknown
Phone SN: RF1D45EJGGR
Android version: 7.0 (NRD90M)
Sales code: XAC
Country: Canada
HW platform: exynos5
HW Chip: exynos7420
HW Modem: unknown
Security patch level: 2017-07-01
SIM 1 status: not ready
Codename: zerofltebmc
Checking Root:
Phone is Rooted.
Initializing exploit...
Executing exploit...
DM-Verity verification..not good!
Fixing DRK..
error 0x00000002
DRK fixing failed!
Performed by 2.6.6 Software version.




guys, what should I do to fix the DRK? should I prepare a CERT file for write in the IMEI?


BR