lg x210 error code PQLNVCFREW

when i try to flash phone i get thiss error..phone comes with signal problems..a while its ok and then no signal and like that in a circle

Welcome to Octoplus/Octopus Box LG Software version 2.9.2
--------------------------------------------------------------------------------
Checking data...OK
Platform: LG MTK
Selected port: COM27
Selected baudrate: 921600
Selected model: X210
Selected USB connection type
Please, power phone OFF and connect cable.OK
Phone found.
CPU name: MT6580
CPU revision: 8A00.CA00.0000.0000
Prepairing loader...OK
Sending loader...OK
Synchronizing with loader...
Detecting flash chip...
Failed!
Failed to detect flash chip!OK
Detecting EMMC flash chip...OK
Reading info...OK
Reconnecting phone...OK
Found model at port COM106
Reading partitions...Failed!
Error code: PQLNVCFREW
Opening "lgx210dsat-00-v10a-cis-xx-feb-03-2016+0.oct"...
Writing Firmware...
Reading partitions...Failed!

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