Facing problems in starting Django project

I created a Django repil in replit while running the code it told me

Please set up a secret key in the secret s (environment variable) tab

What does it means. Because as I researched I saw that the secret key no more exists what do I do now. It is emergency for me to start my Django project in replit. In case I’m using mobile phone.

Again when I created my repil there was a default file named manage.py this code was in the file

#!/usr/bin/env python
"""Django's command-line utility for administrative tasks."""
import os
import sys


def main():
    """Run administrative tasks."""
    os.environ.setdefault('DJANGO_SETTINGS_MODULE', 'django_project.settings')
    try:
        from django.core.management import execute_from_command_line
    except ImportError as exc:
        raise ImportError(
            "Couldn't import Django. Are you sure it's installed and "
            "available on your PYTHONPATH environment variable? Did you "
            "forget to activate a virtual environment?"
        ) from exc
    execute_from_command_line(sys.argv)


if __name__ == '__main__':
    main()

How can I tried to run this code it showed me this notification in the console

Please set up a secret key in the secret s (environment variable) tab

In that cold it is telling me about PYTHONPATH environment but I did not made any change in it and I am also not using virtual environment. I gave again the “pip install django” command using my mobile phone. But it’s telling me that requirement already satisfied.
What do I do now ?

Anyone please give me a solution as soon as possible.