Your pics are very hard to see.
But I don't like the look of that plant altogether. The sacs are very advanced. And have been there for some time. Usually this would be pollen from a past grow that has landed on top of your bud sites or around your bud. Usually you get hermies at the V where you see bracts and then the female builds are built up by stacking (growing calyxes on top of each other, but with this type of hermie I really think if it's just that spot. You had some pollen from a last grow or you touched a bursted sac and it was contaminated
On the lower parts, I'm not sure if can see sacs, I might be wrong. But, I see balls on the outside, which indicates to me that you had another plant burst a sac probably on a low end, and a fan has blow that pollen on your forming buds in this plant during late pre flowering.
If you had any plants burst of males in that tent in the past month, cross contaminated would be my likely source. As I don't think its a one of thing. As I see many balls... meaning, pollen has been spread through contaminated..as hermies are 1 sac or 2 at V sections. So my guess would be cross contaminated
Its usual the tops have sacs like that. Maybe 1, yes, but as I said, these are very advanced. Poor pics. If they've burst. Theres not a lot you can do. You can cut them out. But, id look around that site, and look for any early formation of pods. And if you can cut them out before they turn that energy into making seeds, it'll go back into putting THC into your bud.
it looks although as old pollen from a fan, or just old pollen was touched. Especially if you had pollen on your hands. As the sacs should be lower.
And a top sac burst or just a sac and a fan caught it. Tbd tops would of got it.
Look through the whole plant. Any sacs you can cut straight out. Pinch the sacs with some tissue or cloth to prevent any unwanted pollen spreading if you've any other plants in pre flower I'd get right to this.
(NOW BEFORE ANY SURGERY WORK. PLEASE TAKE YOUR PLANT AWAY FROM YOUR GROW ROOM. OUTSIDE OR A VENTILATED ROOM TO DO YOUR CLEANING UP OF THAT PLANT)
And the plant check, deep clean tools, tent, blow filters, or use a hover to suck your filter stuff looks that after this/ plant check/grow.
Give you tent a deep clean.
The fan blades and such, everything needs a wipe down.
If its just that isolated top. It could just be a form of rodanization (not the rugby word, but its pushing female plants into weeks of flowering and they produce pollen sacs. Either contaminated or a mutation of self female pollination happening way way to early.
If its other parts of the plant. You'll see sacs and they'll have no hairs, they'll feel fairly hard these are late pollinated bud, (seeds would be probably be no good but there'll be seeds) if all your plant is clear its either what I said above imao