Accidental Transcript Omission

I completed an online application for UNCC’s AIG Certification Program (a Teacher Licensure add-on). I truly forgot when applying (because I completely forgot entirely) that I completed one online course from an out-of-state university SEVEN years ago before withdrawing. Yes, I dropped out and never considered it again. I continued teaching and have for over 20 years in the same school district. I didn’t even remember to include this college in my education experience. I have since emailed UNCC the missing unofficial transcript, but I cannot edit my application. Will my mistake, given what it is, seriously affect my chances of being admitted into a certification program? I am really worried and feel unbelievably stupid.