Hi,
I downloaded the openwrt-21.02.1-ramips-mt7621-dlink_dir-860l-b1-squashfs-sysupgrade.bin but the router won't upgrade to the 21.02 version. It keeps giving an error:
Device dir-860l-b1 not supported by this image Supported devices: dlink,dir-860l-b1 dir-860l-b1 - Image version mismatch: image 1.1, device 1.0. Please wipe config during upgrade (force required) or reinstall. Reason: Config cannot be migrated from swconfig to DSA Image check failed.
pierre, the 860 is a practically non-brickable device, since D-Link has fitted it with an emergency flash option in the boot sector.
just use this recovery-boot option from D-Link (just as when you have installed OpenWRT for the first time) and install the factory image of OpenWRT again.