Where to attribute new leads, when they are kind of not new?

[Sean_Richards]

We've been depuping our data and have realised a scenario, which I am keen to hear from other on which philosophical side they stand.

We are B2B.

If you generate a lead from Event A, then a year later generate a lead for the same person, who is now at a different account at event B, you merge and de-dupe the lead (as they are the same person, but with a new email address), but do you update lead source and attribution to Event B?

How do you all think and handle this scenario?