Hey,
Of course that will update the first query, because you are selecting id 100. I would recommend doing Robots::findFirstById(100)
instead. If you had a gender field you could also do: Robots::findFirstByGender("m")
-- It fills in the field in the name!
You have these methods available:
$robot->update();
$robot->insert();
$robot->save(); // Does either insert or update depending on if you find a record (like you did above)
It looks like you have to change the ID you are selecting when you save if you want to save to another record.