I was trying to add new stuffs to check my addItem function. Accidently, the code doesn't work and it creates a database in my mongodb database. I have tried db.todolist.dropDatabase(), but it doesn't work. The picture is when I just started the localhost:3000 on the webpage. I finally fix the code, but these datas are still in my mongo database. I couldn't delete or edit these datas as well. Please give me advises! 

Thank you

I found solution already. Thank you!