G925T imei repair failed it says security damaged

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G925T imei repair failed it says security damaged

i got a G925T working fine, after doing factory reset my imei is gone

it says imei 350000000000006 i tried to write cert failed, repair imei failed

Waiting ADB device... OK
Reading phone info...
Model: SM-G925T
Android version: 6.0.1
PDA version: G925TUVU5EPK5
CSC version: G925TUVU5EPK5
Phone version:
Product code:
CSC country code: Germany
CSC sales code: DTM
Phone SN: R58G50DA6NM
IMEI:
HW version:
RF cal date:
Chip name: EXYNOS7420
Modem board:
Security patch: 2016-11-01
Boot Warranty bit: 1
Checking Super user right... true
Reading NV data... OK
Checking NV data... error
Security damaged (1)

Done with Samsung Tool PRO v.33.5