How to repair IMEI of Huawei P2-6011?

I tried with 3 different firmware, phone is rooted , but always give error :

current IMEI is appeared after writing nvm of another phone

Code:

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SigmaKey 2.30.00 HiSi: Repair IMEI
Connecting....
Android Adapter PCUI (COM42), Provider: Huawei Incorporated, Driver ver.: 2.0.6.714, Date: 2015/12/28, USB\VID_12D1&PID_1035&REV_0231&MI_01
Testing external RAM...1 Gb
Detecting flash...eMMC, Flash size: 16 Gb
Firmware: P2-6011V100R001C00B028SP01, Date: Mon Aug  5 03:48:17 CST 2013, Provider: channel/weurope
Boot Version: P2-6011V100R001C00B028SP01_BOOT, FastBoot Version: P2-6011V100R001C00B028SP01_FASTBOOT
Recovery Version: (unknow), System Version: P2-6011V100R001C00B028SP01_SYSTEM
WiFi address: 70723C50F384, Bluetooth address: 70723C50F383
Removing firmware protection...Skipped
Software IMEI: 861046000040072
Reading data...Not found
Preparing...Error A757DEAD

289018466 Sigma dongle 2.30, Initializing...OK
--------- 2019-04-18 17:41:26 ---------
SigmaKey 2.30.00 HiSi: Repair IMEI
Connecting....
Android Adapter PCUI (COM42), Provider: Huawei Incorporated, Driver ver.: 2.0.6.714, Date: 2015/12/28, USB\VID_12D1&PID_1035&REV_0231&MI_01
Testing external RAM...1 Gb
Detecting flash...eMMC, Flash size: 16 Gb
Firmware: P2-6011V100R001C00B018, Date: Tue May  7 11:16:22 CST 2013, Provider: channel/weurope
Boot Version: P2-6011V100R001C00B018_BOOT, FastBoot Version: P2-6011V100R001C00B018_FASTBOOT
Recovery Version: (unknow), System Version: P2-6011V100R001C00B018_SYSTEM
WiFi address: 70723C50F384, Bluetooth address: 70723C50F383
Removing firmware protection...Skipped
Software IMEI: 861046000040072
Reading data...Not found
Preparing...Error A757DEAD

--------- 2019-04-17 19:33:16 ---------
SigmaKey 2.30.00 HiSi: Repair IMEI
Connecting....
Android Adapter PCUI (COM42), Provider: Huawei Incorporated, Driver ver.: 2.0.6.714, Date: 2015/12/28, USB\VID_12D1&PID_1035&REV_0231&MI_01
Testing external RAM...1 Gb
Detecting flash...eMMC, Flash size: 16 Gb
Firmware: P2-6011V100R001C00B021, Date: Wed May 29 15:28:27 CST 2013, Provider: channel/weurope
Boot Version: P2-6011V100R001C00B021_BOOT, FastBoot Version: P2-6011V100R001C00B021_FASTBOOT
Recovery Version: (unknow), System Version: P2-6011V100R001C00B021_SYSTEM
WiFi address: 70723C50F384, Bluetooth address: 70723C50F383
Removing firmware protection...Skipped
Preparing...Error A757DEAD

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