pulseaudio – cannot edit Pulse Audio in terminal

I need to re-set my default sample rate in Pulseaudio to 48000, it changed without warning a couple of weeks ago. when I enter the following line in terminal – sudo vi /etc/pulse/daemon.conf – I get the following message –

E325: ATTENTION
Found a swap file by the name “/etc/pulse/.daemon.conf.swp”
owned by: root dated: Thu Apr 07 13:20:35 2022
file name: /etc/pulse/daemon.conf
modified: YES
user name: root host name: kelvin-ThinkPad-T420
process ID: 8505
While opening file “/etc/pulse/daemon.conf”
dated: Sat Nov 20 04:40:36 2021

I have tried – vim -r /etc/pulse/daemon.conf
I have tried to delete the swap file
I have pressed enter

Always I am presented with the config file but I am not allowed to edit it at all. Terminal gets stuck in a process which never ends and I have audio which runs 10% too slowly, any ideas?