Yes, you can put it back on the 24/0 light cycle. I grow autos and come across some plants that tend to do that. It will not harm it or stress it. Do that 12/12 for at least three days and than back onto 24/0. Just to be sure. But 90% of the time it will continue to flower on its own after inducing it to flower.So the last few days I had to put my so called auto flower into 12/12 too which it is now flowering.
The problem is my tent runs a 24hr setup as the other autos are loving it.
Can i put this plant back into a 24hr cycle?
-cheers guys