G925t 5.1.1 cant write cert? security damaged?

hi guys, ok i rooted the g925t 5.1.1 OJC with the unikernel amnd twrp and installed supersu, so root is good.. went to do security wipe and it reboots but phone has error message so i wrote back the securioty and got back the correct imei.. i tried then to just write cert but get this

Platform: Samsung Android
Selected port: COM41
Selected model: SM-G925T
Selected file: C:\Users\Dinuba-Wireless\Downloads\cert-sm-g925f_359521066036817_rf8g51vfezn (2).cert
Detected phone model: SM-G925T
Firmware compiled date: Mon Nov 30 10:59:44 KST 2015
PDA version: G925TUVS3DOJC
CSC version: G925TTMB3DOJC
SW version: G925TUVS3DOJC
Phone IMEI: Unknown
Phone SN: R58G5027VGX
Android version: 5.1.1 (LMY47X)
Checking Root:
Phone is Rooted.
Checking Certificate file…
Certificate file successfully checked
Phone connected successfully
Writing certificate…
Security damaged, please Repair Security and try again