Issue while giving python3 manage.py makemigrations command.

[shravyam12]

Extraction was done and even database is having members_blog table with appropriate columns.
Now while giving python3 manage.py makemigrations command following content displayed. What is this issue is about ?

It is impossible to add a non-nullable field 'content' to blog without specifying a default. This is because the database needs something to populate existing rows.
Please select a fix:

1. Provide a one-off default now (will be set on all existing rows with a null value for this column)
2. Quit and manually define a default value in models.py.
   Select an option: