I have been a satisfied user of OpenWRT since 2015, with a Linksys WRT1900AC v1 router. Upon trying to upgrade to 21.02-rc1 from 19.07.5, with
sysupgrade -v openwrt-21.02.0-rc1-mvebu-cortexa9-linksys_wrt1900ac-v1-squashfs-sysupgrade.bin
I get the following error:
Device linksys,mamba not supported by this image Supported devices: linksys,wrt1900ac-v1 armada-xp-linksys-mamba linksys,mamba - Image version mismatch: image 2.0, devic e 1.0. Please wipe config during upgrade (force required) or reinstall. Reason: Partition design has changed compared to older versions (up to 19.07) due to kernel size restrictions. Upgrade via sysupgrade mechanism is not possible, so new installation via factory style image is required. Image check failed.
What is my least risky upgrade procedure - preferably via the OpenWRT command line? Or should I wait for a later release?