Unbricking Linksys E8450 (UBI)

[hnyman]

@SUMepd

Keep settings and retain the current configuration  
Tue Oct 11 15:01:17 UTC 2022 upgrade: The device is supported, but this image is incompatible for sysupgrade based on the image version (1.0->2.0).

Just a guess but a very likely reason: bogus warning

If you have restored older config, you may have restored also an old value of the compatibility string included in /etc/config/system...

Belkin RT3200/Linksys E8450 WiFi AX discussion

After the move to the new "fip in ubi" layout, I ran into bogus compatibility problem in the next sysupgrade: I noticed at the next sysupgrade a few days later that it complained about the sysupgrade image compatibility. I had to manually add the compat_version '2.0' option to /etc/config/system. The reason for the complaint is that although the first sysupgrade image uci-defaults had already set the compat_string, I had restored settings from backup after the fip/ubi change, and the restored …