Changes to common application after submission

Hi I was wondering if schools accept an updated version of a common application even after you’ve submitted it to them already. I made changes to my activities section since I left out some organizational information which I think is pretty crucial. Should I email admissions and tell them about the changes or will they not accept any changes?

From the Common App Website:

Once an application or writing supplement has been submitted to any institution, you cannot make any changes to it (just as if you had dropped it in the mail), and we are not permitted to make changes on your behalf. In general, the Common Application is designed to be completed one time and submitted to all of the colleges at once, or over a period of time. If you need to change information on a submitted application, you must contact the college’s admission office directly to ask how they would like you to proceed.