a600fn android 8 patch ok android 9 patch ok but ng

rooted with magisk
android 8 patch ok cert state ok
android 9 patch ok but ng
tested android 8 modem but same

Operation: Patch Certificate
Selected model: SM-A600FN
Software version: 37.0

Waiting ADB device... OK
Reading phone info...
Model: SM-A600FN
Android version: 9
PDA version: A600FNXXU3BSD2
CSC version: A600FNOXJ3BSE5
Phone version: A600FNXXU3BSD2
Product code: SM-A600FZDNCAC
CSC country code: FRANCE
CSC sales code: AME
Phone SN: R58KB5F8WAM
IMEI: 359292080509060
HW version: REV0.0
RF cal date: 20181123
Chip name: EXYNOS7870
Modem board: SHANNON315
Security patch: 2019-04-01
Boot Warranty bit: 1
SIM State: ABSENT,ABSENT
Checking Super user right... true
Initialization zTool... OK
Running zTool, please wait... OK
Reading data from phone... OK
Searching server... OK
Checking server answer... OK
Executing... OK
Searching server... OK
Waiting for server answer... OK
Patching... OK
Rebooting phone... OK