Do Mixpanel events update retrospectively?

Say John visits a website on Monday and the website sends Mixpanel a landingVisitevent with a super-property of 1.

Then John visits the website on Wednesday and the website sends Mixpanel a landingVisit event with a super-property of 2

On Friday, I go to the Segmentation panel of Mixpanel. Will I see a landingVisit event for John dated Monday with a super-property of 1 AND a landingVisit event dated Wednesday with a super-property of 2?

Or will the events dated Monday and Wednesday both have a super-property of 2 (i.e. the super-property of the Monday event retrospectively updated)?

1 Answer

All Event data in Mixpanel is write once, read forever. This means there's no way your previous events will be altered by a subsequent event.