Invalid, design decision, this is decided when market place is created. If a fixed ratio market place is allowed, then admin can simply create a new market place to cater to that in which manual arbitrartion is required instead of allowing settlements by makers, as noted in comments [here](https://github.com/Cyfrin/2024-08-tadle/blob/04fd8634701697184a3f3a5558b41c109866e5f8/src/core/SystemConfig.sol#L88)