samsung g611f unlock failed?

Waiting ADB device... OK
Reading phone info...
Model: SM-G611F
Android version: 7.1.1
PDA version: G611FXXU1ARA8
CSC version: G611FOJV1ARB2
Phone version: G611FDDU1ARA1
Product code: SM-G611FZDDKSA
CSC country code: KSA
CSC sales code: KSA
Phone SN: R58K53PPFMT
IMEI: 355735096604576
HW version: MP 0.100
RF cal date: 20180519
Chip name: EXYNOS7870
Modem board: SHANNON315
Security patch: 2018-01-01
Boot Warranty bit: 1
Checking Super user right... true
Reading NV data... OK
Checking NV data... OK
Reading data... OK
Detecting MODEM... OK
Reading MODEM... error
Initialization zTool... error (0 1)
Try downgrade modem if possible

Done with Samsung Tool PRO v.33.2