Soft Brick Failed to erase partition topic

I'm trying to unbrick my moto g. whatever I try to flash I get always these kind of errors

Microsoft Windows [Version 6.1.7601]
Copyright (c) 2009 Microsoft Corporation. All rights reserved.

C:\Program Files (x86)\Minimal ADB and Fastboot>mfastboot flash boot boot.img
target max-sparse-size: 256MB
sending 'boot' (10240 KB)...
OKAY [ 5.366s]
writing 'boot'...
(bootloader) Failed to erase partition
(bootloader) Failed to flash partition boot
FAILED (remote failure)
finished. total time: 10.810s

C:\Program Files (x86)\Minimal ADB and Fastboot>mfastboot flash recovery recover
y.img
target max-sparse-size: 256MB
sending 'recovery' (10240 KB)...
OKAY [ 5.382s]
writing 'recovery'...
(bootloader) Failed to erase partition
(bootloader) Failed to flash partition recovery
FAILED (remote failure)
finished. total time: 10.810s

C:\Program Files (x86)\Minimal ADB and Fastboot>mfastboot flash system system.im
g_sparsechunk.0
target max-sparse-size: 256MB
sending 'system' (249379 KB)...
OKAY [ 12.932s]
writing 'system'...
(bootloader) Failed to erase partition
FAILED (remote failure)
finished. total time: 21.886s

C:\Program Files (x86)\Minimal ADB and Fastboot>mfastboot erase userdata
erasing 'userdata'...
(bootloader) Failed to erase partition
FAILED (remote failure)
finished. total time: 9.984s

C:\Program Files (x86)\Minimal ADB and Fastboot>mfastboot erase cache
erasing 'cache'...
(bootloader) Failed to erase partition
FAILED (remote failure)
finished. total time: 9.984s

C:\Program Files (x86)\Minimal ADB and Fastboot>