i think if she slps from 930pm til 6am then ask for milk is still ok.
but if in btw she still gets up for milk, i would think you need to train her already.
cos she is over 1 yo..
if she doesnt kick this so called habit, you're gg to have a hard time training her in the future. but you'll need quite a bit of persistence n be firm to her no boobies in the middle of the night. maybe offer her water instead.
but i think she might fuss about it for some time before she settle down n realise mummy is not gg to give her milk after bed time until breakfast.