Stamps the session identifiers on a starting span: the current session's ID always, and session.previous_id when this page load created a new session in place of an expired one, so the two can be linked in analysis.
session.previous_id
Stamps the session identifiers on a starting span: the current session's ID always, and
session.previous_idwhen this page load created a new session in place of an expired one, so the two can be linked in analysis.