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Network configuration does not reflect the NetworkManager profile

ve flag
Mark

In Ubuntu 22.04, I created a NetworkManager profile called netplan-enp2s0.nmconnection:

[connection]
id=netplan-enp2s0
uuid=7ea6f90b-3495-3533-948a-ef0035687c34
type=ethernet
interface-name=enp2s0
permissions=
timestamp=1634026237

[ethernet]
mac-address-blacklist=
wake-on-lan=0

[ipv4]
address1=192.168.0.100/16,192.168.0.254
dns=192.168.0.254;8.8.8.8;4.4.4.4;
dns-search=
ignore-auto-dns=true
method=manual

[ipv6]
addr-gen-mode=eui64
dns-search=
method=ignore

[proxy]

The profile is enabled and active:

$ nmcli con show
NAME            UUID                                  TYPE      DEVICE 
netplan-enp2s0  7ea6f90b-3495-3533-948a-ef0035687c34  ethernet  enp2s0

But even issuing:

$ sudo nmcli con up netplan-enp2s0

its content is ignored:

$ ip addr
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
    inet6 ::1/128 scope host 
       valid_lft forever preferred_lft forever
2: enp2s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP group default qlen 1000
    link/ether 00:30:18:05:87:36 brd ff:ff:ff:ff:ff:ff
    inet 192.168.0.17/16 brd 192.168.255.255 scope global dynamic noprefixroute enp2s0
       valid_lft 82426sec preferred_lft 82426sec
    inet6 fe80::230:18ff:fe05:8736/64 scope link 
       valid_lft forever preferred_lft forever

and also the GUI shows the outdated settings:

enter image description here

If I change the settings in the GUI it creates a new profile instead of updating the existing one.

What is my mistake?

UPDATE

Here the diff against the profile crated by the GUI (right side):

$ sudo diff netplan-enp2s0.nmconnection netplan-enp2s0-7ea6f90b-3495-3533-948a-ef0035687c34.nmconnection 
6,7c6
< permissions=
< timestamp=1634026237
---
> timestamp=1666184508
10d8
< mac-address-blacklist=
15,17d12
< dns-search=
< ignore-auto-dns=true
22d16
< dns-search=
131
0 + 4
Esther avatar
es flag
Esther
what is the ownership/permissions on the profile? from https://developer-old.gnome.org/NetworkManager/stable/nm-settings-keyfile.html : "For security, it will ignore files that are readable or writable by any user other than 'root' since private keys and passphrases may be stored in plaintext inside the file."
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ve flag
Mark
@Esther yes, they are `rw` only for `root`: `rw------- 1 root root`
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Esther avatar
es flag
Esther
how do the manual profile and the one generated by the GUI compare? are there any differences?
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ve flag
Mark
@Esther question updated
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