Samsung SM-A510F unlock

Samsung SM-A510F unlock

Hi,I can't unlock this phone, can anyone tell me if this version is downgradable ?...I am asking because I don't want to brik the phone:

Welcome to Octoplus/Octopus Box Samsung software version 2.4.3
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To connect SM-G935F phone you have to perform the following steps:
1. Disconnect USB cable from phone.
2. Go to Menu->Settings->More->About Device.
3.Tap on "Build number" 7 times to enable developer options.
4. Go to Menu->Settings->More->Developer options.
5. Turn on "USB Debugging" option.

Platform: Samsung Android
Selected port: COM1
Selected model: SM-A510F
Searching for a phone. Please wait...
Found phone on COM107
Reading info...
Detected phone model: SM-A510F
HW Version: SM2A510FZKACNX
PDA version: A510FXXS3BPI9
CSC version: A510FVFG3BPI9
CP version: A510FXXS3BPI9
Phone SN: R58HA0RB66L
Phone IMEI: 354313-08-019678-4
Unlocking phone...
error code 0
Phone unlocking failed
Performed by 2.4.3 Software version.

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