Hi.
I don't know how to do it. I rewrote default_envs = BIGTREE_OCTOPUS_V1 in

Configuration.h -
#ifndef MOTHERBOARD
#define MOTHERBOARD BIGTREE_OCTOPUS_V1
#endif

I set env.BIGTREE_OCTOPUS_V1 (Marlin-bugfix-2.0x)

When I try to configure, it reports an error: Unknown MOTHERBOARD value set in Configuration.h.octopus.jpg