Please Help ! - Moto G 2nd Gen XT 1072 Can't flash back to STOCK!

I usually don't call for help but i've been here all day trying to solve this but i wan't able to.

I was trying to help a friend who bricked his XT1063 by flashing stock firmware to his phone, and between flashes, i ended up flashing my own phone (XT1072) by mistake with XT1063 firmware. The phone worked barely, i couldn't even pass the wifi connection screen. After that i tried flashing my phone back to XT1072 firmware but with no lock, i just keep getting (bootloader) Preflash validation failed. Strangely, i don't get these errors if i flash XT1063 firmware again.

I already unlocked my bootloader and managed to install TWRP recovery, tried CyanogenMod 13 but no signal/sim card.
I've trying flashing several ROMs i got from here:

firmware . center/firmware/Motorola/Moto%20G%20%282nd%20gen-2014%29/Stock/XT1072/

But with no luck.

Here is the log when trying to flash XT1072 firmware:

adb reboot bootloader


mfastboot.exe flash partition gpt.bin
mfastboot.exe flash motoboot motoboot.img
mfastboot.exe flash logo logo.bin
mfastboot.exe flash boot boot.img
mfastboot.exe flash recovery recovery.img
mfastboot.exe flash system system.img_sparsechunk.0
mfastboot.exe flash system system.img_sparsechunk.1
mfastboot.exe flash system system.img_sparsechunk.2
mfastboot.exe flash system system.img_sparsechunk.3
mfastboot.exe flash system system.img_sparsechunk.4
mfastboot.exe flash modem NON-HLOS.bin
mfastboot.exe erase modemst1
mfastboot.exe erase modemst2
mfastboot.exe flash fsg fsg.mbn
mfastboot.exe erase cache
mfastboot.exe erase userdata
mfastboot.exe reboot


Restore to Original Stock Motorola Firmware for Motorola
Moto G 2014 Titan(XT1068) Provided with lock Bootloader
Please Do press Thanks Button If u really liked My Work @bhu999
error: device not found
target max-sparse-size: 256MB
sending 'partition' (32 KB)...
OKAY [ 0.030s]
writing 'partition'...
(bootloader) Preflash validation failed
FAILED (remote failure)
finished. total time: 0.302s
target max-sparse-size: 256MB
sending 'motoboot' (2184 KB)...
OKAY [ 0.111s]
writing 'motoboot'...
(bootloader) flashing tz ...
(bootloader) flashing rpm ...
(bootloader) flashing sdi ...
(bootloader) flashing aboot ...
(bootloader) flashing sbl1 ...
OKAY [ 1.141s]
finished. total time: 1.252s
target max-sparse-size: 256MB
sending 'logo' (697 KB)...
OKAY [ 0.084s]
writing 'logo'...
OKAY [ 0.318s]
finished. total time: 0.403s
target max-sparse-size: 256MB
sending 'boot' (10200 KB)...
OKAY [ 0.387s]
writing 'boot'...
OKAY [ 0.554s]
finished. total time: 0.943s
target max-sparse-size: 256MB
sending 'recovery' (10280 KB)...
OKAY [ 0.388s]
writing 'recovery'...
OKAY [ 0.356s]
finished. total time: 0.746s
target max-sparse-size: 256MB
sending 'system' (256869 KB)...
OKAY [ 8.078s]
writing 'system'...
(bootloader) Preflash validation failed
FAILED (remote failure)
finished. total time: 8.187s
target max-sparse-size: 256MB
sending 'system' (257186 KB)...
OKAY [ 8.091s]
writing 'system'...
(bootloader) Preflash validation failed
FAILED (remote failure)
finished. total time: 8.194s
target max-sparse-size: 256MB
sending 'system' (258517 KB)...
OKAY [ 8.130s]
writing 'system'...
(bootloader) Preflash validation failed
FAILED (remote failure)
finished. total time: 8.233s
target max-sparse-size: 256MB
sending 'system' (261373 KB)...
OKAY [ 8.218s]
writing 'system'...
(bootloader) Preflash validation failed
FAILED (remote failure)
finished. total time: 8.358s
target max-sparse-size: 256MB
sending 'system' (67668 KB)...
OKAY [ 2.167s]
writing 'system'...
(bootloader) Preflash validation failed
FAILED (remote failure)
finished. total time: 2.218s
target max-sparse-size: 256MB
sending 'modem' (60992 KB)...
OKAY [ 1.958s]
writing 'modem'...
OKAY [ 1.569s]
finished. total time: 3.528s
erasing 'modemst1'...
OKAY [ 0.021s]
finished. total time: 0.021s
erasing 'modemst2'...
OKAY [ 0.044s]
finished. total time: 0.045s
target max-sparse-size: 256MB
sending 'fsg' (320 KB)...
OKAY [ 0.101s]
writing 'fsg'...
OKAY [ 0.085s]
finished. total time: 0.187s
erasing 'cache'...
OKAY [ 0.356s]
finished. total time: 0.357s
erasing 'userdata'...
OKAY [ 2.493s]
finished. total time: 2.494s
rebooting...

finished. total time: 0.002s
Press any key to Exit
Press any key to continue . . .


Help would be greatly appreciated.

Thank you!

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