Bro, not dirty flash, instead clean flash -install with the help of Lenovo software LMSA. It will erase everything. Then do the process again via adb and try to install bgN image.OK Summary Time:
1) - what they mean is: Dirty Flash. Use your Stockrom/Backup/Freshinstall then Dirty Flash GSI on Top on that.
2) i did that with lineage-20.0-20221111-UNOFFICIAL-arm64_bgN-vndklite-secure.img or caos-v316-220321-arm64-bgZ.img & lineage-20.0-20221111-UNOFFICIAL-arm64_bgN-secure.img
but Sadly all i get is Bootscreen - So GSI gets booted but only wont Start.
3)forced Restart or delete cache/dalvik or factory reset won't change it. all i see is the bootanimation (waiting 15mins each time.... znoozefezt)
so again I do the Bernie Sanders and ask again for your help.... am I missing something?