[Solved]Owncloud doesn't found .ocdata file after have change the drive

Troubleshooting
27

I just see that in this file I have:

'trusted_domains' =>
  array (
    0 => 'dietpi IP',
    1 => 'my router public IP',
    2 => 'my DDNS domain',
  ),

the router public IP, I think, changes every time the router goes off. Isn’t it?
Could it be the reason why I can’t reach the server using my DDNS domain when I’m in my network?

(see the topic https://dietpi.com/forum/t/solved-how-to-connect-outside-of-dietpi-network/6041/1)