G611F patch cert wont work

version 8.0.0
flash with eng modem


but when patching phone goes to kernal panic mode

if downgraded to 7.1.1 phone getting restart .......

[CODE]Patch certificate started
Gathering phone info...
Collecting information. Be patient! Do NOT disconnect the phone!
Model: SM-G611F
Sales Code: XXXXX
Country Code:-
Timezone:
Android Version: 8.0.0 [R16NW] [SDK 26]
Build Date: Mon Jan 21 20:43:38 KST 2019
PDA Version: G611FDDU1BSA2 [january 2019, rev2]
Phone Version: G611FDDU1ARB2 [february 2018, rev2]
CSC Version: G611FODD1BSA1 [january 2019, rev1]
Product Code: XXX
HIDSw Version: G611FDDU1BSA2/G611FODD1BSA1/G611FDDU1ARB2/G611FDDU1BSA2
Board Platform: EXYNOS5
Modem Platform: SHANNON315
Serial Number: R28K34CW3KZ
Imei: 355789001111111
Unique Number: CCK003151F0D715
Connections: AT,MTP
Battery Status: 3.78V (27%)
Network Type: GSM
SIM Status: ABSENT,ABSENT
Multisim Config: DSDS
Knox Version: v30
Warranty Bit: 1
Security Patch: 2019-01-01
Data Encryption State: encrypted
Preparing...
Checking current patchcert.
Checking modem.
Checking root.
The phone is rooted by: Chimera SU v1.0
Checking boot image. Be patient! Do NOT disconnect the phone!
Reading data...
Checking modem version.
Reading data. Be patient! Do NOT disconnect the phone!
Patching certificate...
The operation is in progress. Be patient! Do NOT disconnect the phone!
Unable to patch certificate.
Finished at local time: [10.03.19 17:37:15]
WorkID: 75056148