any way to downgrade 9 lite-LLD-AL10 9.1.0.173(C675E10R1P4)

info as below

Gathering information...
Device Model: LLD-AL10
Current software version: LLD-AL10 9.1.0.173(C675E10R1P4)
Hardware version: Ver2.3
Boot info: locked
Image check: secure image verify fail
Android version: 9
System version: LLD-AL10 9.1.0.122(C675E3R1P4)
Battery state: 3691mv
Key version: huawei_key_v1
Root info: SAFE
Rescue version: rescue0.6
Phone info: (bootloader) main version do not exist in oeminfo!
VendorCountry: hw/in
Base version: LLD-LGRP2-OVS 9.1.0.173
Cust version: LLD-AL10-CUST 9.1.0.10(C675)
Preload version: LLD-AL10-PRELOAD 9.1.0.4(C675R1)
Finished at local time: [10.27.20 14:19:56]
WorkID: 112926449

how downgrade to version 8?

help me