I am creating a website using Django as BackEnd and MongoDB as my DataBase but I am experiencing an error while trying to add data into my Patient model using the admin dashboard, 1st entry doesn't trigger any exception however when I try to add 2nd patient my app crashes, and here are the screenshots of my model and my traceback
My Patient Model This model is inherited from the base model and also holds a self reference.
The TraceBack can be found here: https://dpaste.com/GB2REDLGA
However I tried to change my database and upon shifting to SQLite the error was gone. I don't know what is causing this error. Little help would be awesome.