Motorola Moto G (2015) — [ROM STOCK] (bootloader) Preflash validation failed

Oi gente, seguinte, eu pedi ajuda aqui referente a um problema que tive no celular, e me recomendaram instalar a Rom Stock no meu XT1550. Fiz isso, deu certo e tudo mais.
Só que aí eu decidi instalar a CyanogenMod 13 por algumas coisas no armazenamento. Também deu tudo certo.
Agora estou tentando voltar pra antiga e reparei que quando eu uso o comando:
mfastboot flash system system.img_sparsechunk.x
Ele demora uma eternidade (300s pra cima)
E a partir da 3 começou a dar os seguintes erros:

C:\Users\Gabriel\Desktop\MOTO G\ADB + mfastboot>mfastboot flash system system.im
g_sparsechunk.3
target reported max download size of 268435456 bytes
sending 'system' (255386 KB)...
FAILED (data transfer failure (Too many links))
finished. total time: 98.579s

C:\Users\Gabriel\Desktop\MOTO G\ADB + mfastboot>mfastboot flash system system.im
g_sparsechunk.3
target reported max download size of 268435456 bytes
sending 'system' (255386 KB)...
OKAY [324.656s]
writing 'system'...
(bootloader) Preflash validation failed
FAILED (remote failure)
finished. total time: 324.798s

C:\Users\Gabriel\Desktop\MOTO G\ADB + mfastboot>mfastboot flash system system.im
g_sparsechunk.3
target reported max download size of 268435456 bytes
sending 'system' (255386 KB)...
OKAY [320.407s]
writing 'system'...
(bootloader) Preflash validation failed
FAILED (remote failure)
finished. total time: 320.513s

C:\Users\Gabriel\Desktop\MOTO G\ADB + mfastboot>mfastboot flash system system.im
g_sparsechunk.3
target reported max download size of 268435456 bytes
sending 'system' (255386 KB)...
OKAY [325.629s]
writing 'system'...
(bootloader) Preflash validation failed
FAILED (remote failure)
finished. total time: 325.858s

C:\Users\Gabriel\Desktop\MOTO G\ADB + mfastboot>mfastboot flash system system.im
g_sparsechunk.4
target reported max download size of 268435456 bytes
sending 'system' (257385 KB)...
OKAY [328.373s]
writing 'system'...
(bootloader) Preflash validation failed
FAILED (remote failure)
finished. total time: 328.448s

C:\Users\Gabriel\Desktop\MOTO G\ADB + mfastboot>mfastboot flash system system.im
g_sparsechunk.5
target reported max download size of 268435456 bytes
sending 'system' (240402 KB)...
OKAY [301.849s]
writing 'system'...
(bootloader) Preflash validation failed
FAILED (remote failure)
finished. total time: 301.899s

Alguém sabe se eu posso seguir adiante ou se eu tenho que fazer alguma coisa pra resolver antes?

— alterado em 10/02/2016, 03:22:05