Default [Q] How to fix bad flash 4.4 ?

Help,

Before I was with 4.4 XEO Region (Knox 0x1), I wanted to go to PRO Region

I was nearly at the end of Odin 3.07:
hidden.img.ext4
transmission complete
now writing ....
Receive response from boot-loader
FAIL!(Size)

I want to keep Samsung stock, and take the minus of risk because I have Knox 01
(I can go to download mode without problem)

Thanks in advance for your help
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Galaxy SM-N9005
Free Mobile
OS: Stock OXXENA5
Knox: 01 and root