A30 remove KG fail,need help

Chimera Mobile Phone Utility version: 22.26.1327 @ 2019-09-10
Knox Guard Unlock started
Gathering phone info...
Collecting information. Be patient! Do NOT disconnect the phone!
Model: SM-A305F
Sales Code: THL
Country Code: Iraq
Timezone: Asia/Phnom_Penh
Android Version: 9 [PPR1.180610.011] [SDK 28]
Build Date: Tue May 28 10:46:14 KST 2019
PDA Version: A305FDDU2ASE5 [may 2019, rev5]
Phone Version: A305FXXU2ASE5 [may 2019, rev5]
CSC Version: A305FOJM2ASE5 [may 2019, rev5]
Product Code: MID
HIDSw Version: A305FDDU2ASE5/A305FOJM2ASE5/A305FXXU2ASE5/A305FDDU2ASE5
Board Platform: EXYNOS5
Modem Platform: SHANNON327
Serial Number: R58M462TP5K
Imei: 356970103857417
Unique Number: CCU005EF1497046
Connections: AT,MTP
Battery Status: 3.79V (34%)
Network Type: GSM
SIM Status: LOADED,ABSENT
Multisim Config: DSDS
Knox Version: v30
Warranty Bit: 0
Security Patch: 2019-06-01
Data Encryption State: encrypted
Unlocking KnoxGuard...
The operation is in progress. Be patient! Do NOT disconnect the phone!
It seems, this unlock method is not supported by the phone.
Unlock failed.
Finished at local time: [09.10.19 10:06:19]
WorkID: 72675307