It is impossible to add a non nullable field without specifying a default. Django error

I got this following error while trying to add a non-nullable field (description) to an existing model (Category) without specifying a default value.

[Supreetvajjaramatti]

bro I have one problem that Django - python in vs if i run any django project if shows like " self._sock.sendall(b)
ConnectionAbortedError: [WinError 10053] An established connection was aborted by the software in your host machine" this error plese help me come out of it