complicated action can you help?

ok so my buddy is giving me a plant its already showing pistils but i think shes too little and see more potential in her can i swicth her BACK to veg and topp her? if soo what will be the effects thanks and +Rep if you can answer this

it will be work.but i think will have influence,

If she's just showing preflowers, it's no big deal. Just keep her on your veg light schedule. If she's further along (for instance showing a mound of pistils at the top of the branch), you will probably need to put her under 24 hours of light for a while. Personally, if she's too far along, I would just let her be. You're better off with a smaller, higher quality plant than one that gets all stressed and produces lots of mediocre bud.

Switch back to veg, no big deal. Stress affects growroom timing, not genetics. True hermies show male flowers in week 3-4 of flower, forced hermies show much later.

Pic would help. IMO, let it flower if it's 12" or taller. Mine went from 18" to 39" while flowering.