Trigger a frontmatter update from a different file

What I’m trying to do

I have build a little Meeting tool… I exported my addressbook to single MD files per person. Frontmatter, Dataview, Contact details… really nice. I have one frontmatter field: “last-seen”

So everytime I meet a person I have a meeting note, I link the person as an Attendee.

WHEN I do this, it would be fantastic, that this updates my Person.md’s field: “last-seen” to the meeting date.

Is this even possible? Is it easy to sort out?

Regards,
Nils

Yes, it should be possible by using templater, so you trigger a template that inserts the attendee and also searches that person note and updates it’s last-seen field. I’m researching about this, so I can’t provide a full answer yet