Hello! https://www.openstreetmap.org/node/10827541858/history has maxspeed = default that was added in this edit
Is it just less-used duplicate of maxspeed=implicit ?
See https://wiki.openstreetmap.org/wiki/Key:maxspeed=implicit and https://wiki.openstreetmap.org/wiki/Key:maxspeed=default

Is there any reason to not change to more widely used tag?