Mushroom growing in one of the pots

Hello, I noticed a couple days ago that there was a white mushroom growing out the dirt. And only one out of 25 plants too, it was given advanced nutrients and the soil is sunshine number 4. I was wondering if anybody has had this happen before and what it means. It doesn't seem to affect the plant at all, but I was curious if I should remove it in case it attracts decease or something. Heres a picture

Yes I have had this happen to me but only when I used soil with mushroom compost,sunshine4 and AN probably didn't cause this to happen though but your shroom could be enjoying the food and moist medium.