Comment 2 for bug 1879770

What's the output of:

$ networkctl status enp3s0

specifically, what's the 'Link File'. Change the name of the interface if needed, of course.

I am guessing it's "/lib/systemd/network/99-default.link". That's because your link file is named "myname123.link", and "m" is after "9", so 99-default.link matches first (because it matches "OriginalName=*"). If this is the case, try renaming your link file so it's lower (alphabetically) than 99-, e.g. "50-myname123.link".

Alternately, if networkctl shows your interface link file is "/run/systemd/network/10-netplan-enp3s0.link", it's because you have it configured using netplan, which also creates a link file for some operations (like setting interface name). Check your /etc/netplan/ dir for *.yaml files.