I'm trying to stretch a field into another field in cuboid mode

it says "Cannot extend inside other player's fields"

but the fields BOTH have no-conflict
and it lets me overlap them by the default placement, just not in cuboid mode

Tested this and cannot duplicate the problem. Can you re-test in an isolated area where you are sure there are no other fields?

the one im moving into has another mixing group, not sure if this is why?