I Can't Change Machine IP

Hi, my server is on GCP. I want change CyberPanel machine IP from SSH but it says Permission denied.

xxx@xxx-vm:~$ /etc/cyberpanel/machineIP
-bash: /etc/cyberpanel/machineIP: Permission denied

when i run this command:
xxx@xxx-vm:~$ nano /etc/cyberpanel/machineIP
it says on bottom
[ File ‘/etc/cyberpanel/machineIP’ is unwritable ]

Login as root to modify this file.