GSM-Forum - LYA-L29 Not booting, and wont flash,need help

Hello, i have Mate 20 PRO,when try to power it says :
"Your device has failed verification and may not work properly" and not booting to OS. I can go to recovery and fastboot , phone goes to Upgrade mode as well, but have problem with flashing.

Here is phone info :

Code:

Vendor/Country: demo/eu

System version: Skipped

Android version: 9

Base version: LYA-LGRP2-OVS 9.0.0.126

Custom version: LYA-L29-CUST 9.0.0.14(C652)

Preload version: LYA-L29-PRELOAD 9.0.0.16(C652R1)

Huawei-Over-the-Air info:

        C_version: C652

        D_version: D000

        PLMN: 25503

        BoardID: 8426

        DeviceName: LYA-L29

Done

it has demo/eu region and i try to flash C652 firmware: LYA-L29 Laya-L29C 9.0.0.108D(C652E13R1P16) Firmware 9.0.0 r3 EMUI9.0.0 05015KLX but it gives me error.

Code:

SigmaKey 2.36.00 HiSi: Enable downgrade

DBAdapter Reserved Interface (COM680), Provider: HUAWEI Technologies CO.,LTD, Driver ver.: 1.0.26.0, Date: 18.05.2016, USB\Vid_12D1&Subclass_13&Prot_23

Enabling firmware downgrade...D:\Downloads\mate20\LYA-L29C_9.0.0_C652.skf

Hardware IMEI: 020304050607080

Flash file D:\Downloads\mate20\c652\Software\dload\update_sd_base\PTABLE.APP

Writing flash SHA256RSA OK

Writing flash CRC OK
 Writing flash BASE_VERLIST ...Version mismatch.
 Use "Enable downgrade" action  first, then retry flashing.

Why it gives me an error? maybe it because my firmware :
Phone has inside - Build number: LYA-L29 9.1.0.300D(C652E14R1P16)
Firmware has (C652E13R1P16)
I need another firmware, where can i get it? or i can change region to hw\eu somehow, and it will help to flash C432?

Also try downgrade file LYA-L29C_9.0.0_C652.skf it gives same error.

I need buy power pack to revive this phone?