note5 dm-verity verification failed


i have note5.when i call phone restart or shutdown. i try to update difrent firmware.when i go recovery getting error dm-verity verification failed.
any solution for this? thank u

here is log

Unable to detect imei number.
Model: SM-N920C
Sales Code: XSG
Country Code: UAE
Timezone: Asia/Bahrain
Android Version: 5.1.1 [LMY47X]
Build Date: Tue Nov 17 19:30:57 KST 2015
PDA Version: N920CXXU2AOK6 [november 2015, rev6]
Phone Version: N920CXXU2AOK5 [november 2015, rev5]
CSC Version: N920COJP2AOJ5 [october 2015, rev5]
Board Platform: EXYNOS5
Modem Platform: SHANNON333
Serial Number: RF8G82CNZYH
Battery Status: 3.79V (38%)
Network Type: GSM
Knox Version: v30
Warranty Bit: 1


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