sub domain pointed to the wrong website folder - django

Question

I have a linux server that run multiple different website on multiple different domain which are working fine.
But I created a sub domain for one of the domain which is demo.mywebsitedomain.com I did the configuration like it was a different domain which mean I created a specific nginx socket / service / nginx config file for this subdomain
But when I go the my link demo.mywebsitedomain.com it run the website application of an other django application folder, it not the one who I have pointed in the socket and service file. I am verry confuse.
It should run the django application whos in the testdemo folder but instead it run a different folder application. Those are the file I created for the subdomain
sudo vim /etc/systemd/system/testdemo.socket
[Unit]
Description=gunicorn socket
[Socket]
ListenStream=/run/testdemo.sock
Environment="PATH=/usr/bin:/home/tiber/testdemo/env/bin"
[Install]
WantedBy=sockets.target
sudo vim /etc/systemd/system/testdemo.service
[Unit]
Description=gunicorn daemon
Requires=testdemo.socket
After=network.target
[Service]
User=tiber
Group=www-data
WorkingDirectory=/home/tiber/testdemo
ExecStart=/home/tiber/testdemo/env/bin/gunicorn \
--access-logfile - \
--workers 3 \
--bind unix:/run/testdemo.sock \
mysite.wsgi:application
[Install]
WantedBy=multi-user.target
sudo vim /etc/nginx/sites-available/testdemo
server {
listen 80;
server_name demo.mywebsitedomain.com;
location = /favicon.ico { access_log off; log_not_found off; }
location /static/ {
root /var/www/testdemo;
}
location /media/ {
root /var/www/testdemo;
}
location / {
include proxy_params;
proxy_pass http://unix:/run/testdemo.sock;
}
}