Going back to 18/6 from 12/12

Okay so I’m on my first grow, 3 out of my 6 plants hermied so I quickly popped 6 seeds

3 x blue gelato 41
2 x gorrila skittles
1 x cataract kush

The tent was already on 12/12 and now the first 3 plants are 6 weeks into flower and the baby are growing fast too, the babies have already shown one or two pistils but I was wondering, when the mature plants finish in like 2 - 3 weeks would I be able to put the baby’s that have been 12/12 from seed back to 18/6, will they hermie when I put them back onto 12/12?

Bump

They will revert back to veg and shouldn't herm unless they were already prone to doing so.
You might be better going for 20/4 or 24/0 to reveg them and knocking it back down to 16/8 if that's what your prefer once you see signs of new growth, which will be weird looking to start with. It can take a long time to revert back.