Auto mix up

Hi i seem to have a mix up of 1 auto and 4 none autos. The auto has started to flower and grow buds but the none auto seed are only a week havent but they have all been on 12/12 for 1 week.

Can i just leave it to carry on and let it flower alongside the others or will i have to harvest the auto early.

Any help/advise would be great.

Thanks

Yes and yes.

Any idea how much sorter it will be in flower for?