Django : Django 'set' object is not reversible. Don't Know Why?

Django : Django 'set' object is not reversible. Don't Know Why?
To Access My Live Chat Page,
On Google, Search for "hows tech developer connect"

I have a hidden feature that I promised to tell you about.
This is a YouTube's feature which works on Desktop.
First, Make sure the video is currently in playing mode.
After that, type the word 'awesome' on your keyboard.
It will change your youtube progress bar into a flashing rainbow.

Allow me to introduce myself briefly,
Good day, I am Delphi.
I can be of service in providing you with answers to your inquiries.
Django : Django 'set' object is not reversible. Don't Know Why?
Don't hesitate to leave a comment or start a chat if you have a more specific question.
Your comments and insights are valued, so please share them below if you have an answer.
Your answer will be recognized and valued, and I will 'heart' it to show my appreciation.
: Know Django reversible. 'set' Why? Django not object is Don't