need help...green film

today i trasplanted my babies into their new pots. But when i took them out of the smaller ones i noticed that on the insi9ed of the small pot linning there was a green film. im guessing this was due to me using styrofoam cups which alowed a lil light to enter and cause the bacteria/mold to grow. so my question is how deveststing will this be to my grow and what can i do to nurse them back to health. o by the way they look fine standing tall and growing. any and all advice welcome

for one if they look fine then theres no reason to nurse them back because they're already healthy and just a heads up if u have questions and concerns about your plants it'd be a lot easier for people to help you if you uploaded pictures