moto g preflash validation failed-help me

i have done many moto g using file below

ASIA-DS_4.4.4_KXB21.14-L1.40_34_cid7_CFC_1FF.xml

but now this file error as below

C:\MOTO G>mfastboot.exe flash partition gpt.bin
target max-sparse-size: 256MB
sending 'partition' (32 KB)...
OKAY [ 0.047s]
writing 'partition'...
(bootloader) Preflash validation failed
FAILED (remote failure)
finished. total time: 0.359s

phone screen flash logo error is """version downgraded for primary gpt"""

customer said he tried to upgrade-after it hang in logo

help me