Old configuration DNS from old domain nanme still here?

Ok, since this operations, I have a new issue:
[ERROR] Le service yunomdns est failed
I have try ‘yunohost service restart yunomdns’ and ‘yunohost service log yunomdns’ and got this:

 - juil. 10 18:35:03 systemd[1]: Started YunoHost mDNS service.
  - juil. 10 18:35:03 yunomdns[572]: Traceback (most recent call last):
  - juil. 10 18:35:03 yunomdns[572]:   File "/usr/bin/yunomdns", line 170, in <module>
  - juil. 10 18:35:03 yunomdns[572]:     sys.exit(0 if main() else 1)
  - juil. 10 18:35:03 yunomdns[572]:   File "/usr/bin/yunomdns", line 57, in main
  - juil. 10 18:35:03 yunomdns[572]:     with open("/etc/yunohost/mdns.yml", "r") as f:
  - juil. 10 18:35:03 yunomdns[572]: PermissionError: [Errno 13] Permission denied: '/etc/yunohost/mdns.yml'
  - juil. 10 18:35:03 systemd[1]: yunomdns.service: Main process exited, code=exited, status=1/FAILURE
  - juil. 10 18:35:03 systemd[1]: yunomdns.service: Failed with result 'exit-code'.
  - juil. 10 21:02:24 systemd[1]: Started YunoHost mDNS service.
  - juil. 10 21:02:24 yunomdns[3651]: Traceback (most recent call last):
  - juil. 10 21:02:24 yunomdns[3651]:   File "/usr/bin/yunomdns", line 170, in <module>
  - juil. 10 21:02:24 yunomdns[3651]:     sys.exit(0 if main() else 1)
  - juil. 10 21:02:24 yunomdns[3651]:   File "/usr/bin/yunomdns", line 57, in main
  - juil. 10 21:02:24 yunomdns[3651]:     with open("/etc/yunohost/mdns.yml", "r") as f:
  - juil. 10 21:02:24 yunomdns[3651]: PermissionError: [Errno 13] Permission denied: '/etc/yunohost/mdns.yml'
  - juil. 10 21:02:24 systemd[1]: yunomdns.service: Main process exited, code=exited, status=1/FAILURE
  - juil. 10 21:02:24 systemd[1]: yunomdns.service: Failed with result 'exit-code'.

Ok I found a solution herre: Service yunomdns is broken - #4 by metyun