LG M250n imei repair error

Hi, please help me. i want to repair the M250n imei but not worked.

LG 2-3G Tool v9.48
supported models: 1555

Laf Protocol: 01000005
Model name: LG-M250n
Software verion: M25012q
Android verion: 7.0
Target operator: GLOBAL
Target country: COM
Chipset: mt6750
IMEI1: 35xxxxxxxxxxxxxx
IMEI2: 35xxxxxxxxxxxxxx
Reading... done
Sec zone saved: ..\Backup\LG-M250n_35xxxxxxxxxxxxxx_29032018_140811.lgsb1
IMEI1: 35xxxxxxxxxxxxxx
IMEI2: 35xxxxxxxxxxxxxx
Write...
Laf cmd info: send LAF_CMD_IOCTL, retry #1
Laf cmd info: send LAF_CMD_IOCTL, retry #2
Laf cmd info: send LAF_CMD_IOCTL, retry #3
Laf cmd error: LAF_CMD_IOCTL could not write.
Elapsed: 103 secs. --> (v9.48)