Gio999 yes it fixed it just fine.
Part number 9700038 which I got from Bella Barista, albeit I had to ask them in the chat as it doesn’t appear in the standard spares list on the website.
It’s not too hard to change, a bit fiddly getting enough leverage in there to unwind it is all. I may have said some swears at some point trying to do that. I used some PTFE tape on the threads with the new one.
Before you change it, it might be worth checking it you can just reseat the tubing into the push-fit connector as Dave described further up the page? Yours doesn’t look as bad as mine for corrosion etc.