error : conflicting server name

[RPM]

Hello Nginx Community,

Our website was perfectly running under nginx since yesterday :
  https://www.nouvelledonne.fr
OS server is debian Jessie (version 8.3.0).

After the SSL certificate renewal (with Let's encrypt) the following
error appears :

cat /var/log/nginx/error.log

2018/06/02 22:20:41 [warn] 16742#0: conflicting server name
"www.nouvelledonne.fr" on 0.0.0.0:443, ignored
2018/06/02 22:20:41 [notice] 16742#0: signal process started

-- 
Thanks for your help
Rene Paul Mages (ramix)  GnuPG key : 0x9840A6F7
http://renemages.wordpress.com/debian
http://nosoftwarepatents.wikidot.com
http://twitter.com/RenePaulMages