a nanner or 3, just tweeze them out and keep close watch...
however, what you have a is a fully functional pollen sac growing at a preflower location... this is either a real herm or simply a male plant, which wouldn't be possible if an autoflower without contamination or mixing up seeds etc. i would tear it down and throw it out... you could be a bit patient, pluck all the sacks and give it a few more days to show you how prevalent it is... maybe it was some light leak that caused it in a specific location on plant, or maybe it's gonna keep poppin a bunch of male sex organs... time will tell, but i don't think your odds are good.
a full pollen sac can release a ton of pollen. it's got a full complement of male parts. on the other hand a nanner (or anther) you see in buds sometimes are less potent. these are what 'plop' out of a pollen sac.
If you see any that look nearly fully developed, don't hesitate to kill those plans off now as opposed to later. this stuff doesn't grow to completion overnight and takes time before they start releasing pollen.