LG M400f Patching security...Failed!

Welcome to Octoplus/Octopus Box LG Software version 2.9.4
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Checking data...OK
Platform: LG MTK
Selected port: COM20
Selected baudrate: 921600
Selected model: M400F
Selected USB connection type
Please, disconnect cable, reconnect battery, connect P999 cable (with
910k resistor)
or
Reconnect battery, press and hold "Vol+" for 10 seconds and connect
Micro USB cable.
Phone found at port COM56
Mode: Emergency
Initializing flash...OK
Model ID: LG-M400F
Platform: mt6750
Android version: 7.0
SW version: LGM400FAT-00-V10a-334-03-MAR-15-2017+2
LAF Version: 1.1
Product ID: VS06S170529006115
IMEI:
Target operator: GLOBAL
Hardware: rev_10
Battery level: 50%
Reading partitions...OK
Checking security...
Checking security passed!
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IMEI: 356472-08-1111111-2
Bluetooth address: 04:1B:6D:89:7C:61
Wi-Fi MAC address: 04:1B:6D:DD:A1:3D
SPC: 000000
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Detecting writing method...
Trying third method...Failed!
Fixing IMEI A...
New IMEI A: 356472-08-111111-6
Reading security area...OK
Backup saved to "M400F_35647208111111_15-04-2019_02-34-47.EEP"
Patching security...Failed!
Performed by 2.9.4 Software version.