A320FL after every restart relocking

UNLOCK INSTRUCTIONS:
Phone must be rooted!
If the software can't root the phone automatically,
then you must root your device manually.
1. Power on the phone.
2. Tap 7 times on 'Build number' in 'Settings'-'About phone' to enable 'Developer options',
go to 'Settings'-'Developer options' and enable 'USB debugging'.
3. Connect the phone to PC with USB cable, install drivers if needed.
4. Select device in ADB settings.
5. Press 'Unlock' button.

Reading codes using sever:
Warning! Knox warranty must be active (0x00)!
If you have it voided (0x01(void)), then you can't unlock this phone using sever.
1. Power on the phone.
2. Type *#0808# and select 'DM+MODEM+ADB'.
3. Connect the phone to PC with USB cable, install drivers if needed.
4. Press 'Read Codes via server' button, write your login and password in window if it will appear.
(Login and password will be saved as default after first input and can be changed in settings)

Operation: Read Codes via Server
Selected model: SM-A320FL
Software version: 37.0

Checking Login and Password... OK
Ballance: 20 crd.
You have 20 credit(s) left. This operation takes 5 credits.Continue? Yes
Waiting ADB device... OK
Reading phone info...
Model: SM-A320FL
Android version: 8.0.0
PDA version: A320FLXXU4CSD2
CSC version: A320FLXEF4CSD1
Phone version: A320FLXXU4CSD1
Product code: SM-A320FZKNXEF
CSC country code: France
CSC sales code: XEF
Phone SN: RF8JB2ZHCDX
IMEI: 353118098661617
HW version: MP 0.300
RF cal date: 20171123
Chip name: EXYNOS7870
Modem board: SHANNON315
Security patch: 2019-04-01
Boot Warranty bit: 1
SIM State: NETWORK_LOCKED
Initialization zTool... OK
Running zTool, please wait... OK
Reading data from phone... OK
Searching server... OK
Checking server answer... OK
Executing... OK
Reading data from phone... OK
Calculating... OK
Searching server... OK
Waiting for server answer... OK
Freeze code: 20491506
NET lock: 68353081
SUB lock: 00000000
SP lock: 00000000
CP lock: 00000000
SIM lock: 00000000
For check lock status: *#7465625#

Done with Samsung Tool PRO v.37.0
i flash with service firmware A320FLXXU4CSD2 again same after every restart must input code