Odin failing to flash

[AC Question]

Samsung S5 Active G870A

<ID:0/026> Added!!
<OSM> Enter CS for MD5..
<OSM> Check MD5.. Do not unplug the cable..
<OSM> Please wait..
<OSM> G870AUCU1ANE4_G870AATT1ANE4_G870AUCU1ANE4_HOME.tar.md5 is valid.
<OSM> Checking MD5 finished Sucessfully..
<OSM> Leave CS..
<ID:0/026> Odin v.3 engine (ID:26)..
<ID:0/026> File analysis..
<ID:0/026> SetupConnection..
<ID:0/026> Initialzation..
<ID:0/026> Get PIT for mapping..
<ID:0/026> Firmware update start..
<ID:0/026> SingleDownload.
<ID:0/026> aboot.mbn
<ID:0/026> NAND Write Start!!
<ID:0/026> FAIL! (Auth)
<ID:0/026>
<ID:0/026> Complete(Write) operation failed.
<OSM> All threads completed. (succeed 0 / failed 1)