Nope! if you have lost the confirmation you have nothing to worry about and it will not cause any big issues regarding your admission. Secondly the DU UG admission application ends on 31st August,2021. So there can be correction window options coming in future but till now there are no notification available for that. I would recommend you to keep an eye on the official website in order to get the notification. Also you can stay tuned with career360.com (//career360.com) in order to stay updated.

To know more about DU UG visit the link below:

https://university.careers360.com/articles/du-application-form

I hope this answer helps. All the very best for your future endeavors!