s6 problem dm verity

After upgrade to latest firmware G920FXXS4DPIJ_G920FITV4DPH1_ITV I find when I start the phone in recovery the written DM verity verification failed need tocheck DRK first.
IMEI is also now corrupted: 3500000000000006 / 02.ho tried octopus doing drk fix but does not change . I can give the team some advice to solve the problem ?? I am attaching the log file : https://www.dropbox.com/sh/t9rwri3ya…MaR6DQJ8a?dl=0

Welcome to Octoplus/Octopus Box Samsung software version 2.3.8
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To connect SM-G920F phone you have to perform the following steps:
1. Disconnect USB cable from phone.
2. Go to Menu->Settings->More->About Device.
3.Tap on "Build number" 7 times to enable developer options.
4. Go to Menu->Settings->More->Developer options.
5. Turn on "USB Debugging" option.
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Platform: Samsung Android
Selected port: COM3
Selected model: SM-G920F
To put SM-G920F into Download Mode, You have to perform the
following steps:
1. Reconnect the battery.
2. Press and hold "Volume-" + "Home" + "Power ON" keys.
3. When phone turns on, press "Volume+" key.
Repairing EFS…
Searching for a phone. Please wait…
Phone found.
EFS Repair successfully
Performed by 2.3.8 Software version.
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Platform: Samsung Android
Selected port: COM3
Selected model: SM-G920F
Please, press "OK" button on the phone to allow USB debugging..
Please, press "OK" button on the phone to allow USB debugging..
Detected phone model: SM-G920F
Firmware compiled date: Mon Sep 19 12:13:26 KST 2016
PDA version: G920FXXS4DPIJ
CSC version: G920FITV4DPH1
SW version: G920FXXS4DPIJ
Phone SN: RF1D45EJGGR
Android version: 6.0.1 (MMB29K)
Sales code: ITV
Country: ITALY
HW platform: exynos5
HW Chip: exynos7420
HW Modem: SHANNON333
Codename: zerofltexx
Checking Root:
Phone is Rooted.
Initializing exploit…
Executing exploit…
DM-Verity verification..not good!
Fixing DRK..
DRK fixed successfully
Performed by 2.3.8 Software version.