nginx error "conflicting server name" ignored

server {
#listen   80; ## listen for ipv4; this line is default and implied
#listen   [::]:80 default ipv6only=on; ## listen for ipv6


#root /usr/share/nginx/www;


root /home/ubuntu/node-login;
# Make site accessible from
server_name ec2-xx-xx-xxx-xxx.us-west-1.compute.amazonaws.com;


location /{
proxy_pass http://127.0.0.1:8000/;
proxy_redirect off;
}

}

this results in nignx error [warn] conflicting server name "ec2..." on 0.0.0.0:80 ignored I dont understand, any explanation appreciated. Thanks.