S6 imie repair help needed

Chimera Mobile Phone Utility version: 18.46.1356 @ 2018-08-22
Printing phone history

Repair IMEI
22/08/2018
10:58:52

SW Change
22/08/2018
10:47:19

Repair IMEI
22/08/2018
10:45:20

Repair Device Root Key
22/08/2018
10:10:25

Repair IMEI
22/08/2018
10:06:16

Repair started
Gathering phone info...
Collecting information. Be patient! Do NOT disconnect the phone!
Model: SM-G920F
Sales Code: EVR
Country Code: UK
Timezone: Europe/London
Android Version: 7.0 [NRD90M] [SDK 24]
Build Date: Wed Jun 20 16:33:06 KST 2018
PDA Version: G920FXXU6ERF5 [june 2018, rev5]
Phone Version: G920FXXU6ERF6 [june 2018, rev6]
CSC Version: G920FEVR6ERF2 [june 2018, rev2]
Product Code: EVR
HIDSw Version: G920FXXU6ERF5/G920FEVR6ERF2/G920FXXU6ERF6/G920FXXU6ERF5
Board Platform: EXYNOS5
Modem Platform: SHANNON333
Serial Number: RF8H20232HF
Imei: 350000000000006
Unique Number: 1115FB449C171805
Connections: AT,MTP
Battery Status: 3.88V (49%)
Network Type: GSM
SIM Status: READY
Knox Version: v30
Warranty Bit: 1
Security Patch: 2018-06-01
Data Encryption State: unsupported
Repairing IMEI...
Reading and storing secure image. Be patient! Do NOT disconnect the phone!
Checking secure image.
Repair imei failed.
Unable to Repair imei
Finished at local time: [08.22.18 12:24:21]
WorkID: 42830138
WHAT CAN I DO