Returning to Stock Fail

[kxee]

Phone:MOTO G Turbo Edition (Indian)
I had been using a custom rom for quite sometime but now i want to return stock rom
I downloaded the firmware.
Guide im using is https://forum.xda-developers.com/2015-moto-g/general/guide-fastboot-flashing-factory-t3187750
but when i flash gpt.bin it says

target max-sparse-size: 256MB
sending 'partition' (32 KB)...
OKAY [  0.007s]
writing 'partition'...
(bootloader) Preflash validation failed
FAILED (remote failure)
finished. total time: 0.366s

can anyone help?
this is my only working device.

 

[SpiralX15]

https://android.stackexchange.com/q...-2015-due-to-preflash-validation-failed-error

Check this and see if it helps.