Andrew S.

I believe you can either use the WHERE or the as_of_timestamp options to filter. https://developer.mixpanel.com/reference/engage-query

if a user property is "updated" they only retain the current value in the data. If you wrote the name(s) to a list property you could append each name to have all names they have used. but you'd have to do that in the implementation, not after the fact.

when I did it recently, I took three separate projects, exported all events from each, appended "source" property to each JSONL object to represent which of the original projects it came from, and then imported the JSONL's to a new combined project. So I wrote a simple python script to add the "missing" property from each.

example script to do an export (need to setup a service account).

Unfortunately events are immutable in Mixpanel so you have to do an export via the API, use text-edit or write a script to do the changes/additions, and then do an import.

depending on the length of your history you may have to go back and export/transform/import your data into a new project to back populate this info into old events.

You will want to make sure you have "Group Analytics" so you can set a separate key for your grouping vs users. e.g., in my case "Integration ID" or "Merchant Category".

https://mixpanelcommunity.slack.com/archives/C02S7HLJX6V/p1757542381089249

Yes. I’ve used it multiple times.

yeah that is strange. I see how you can view them at an org level to delete them but all permissions are at a project level so I don't see why you can't assign it to multiple projects