Fixing Events with Missing Custom Properties from Last Week

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To fix events that missed expected custom properties in the past week, you can use Mixpanel's Borrowed Properties feature. This feature allows you to add properties to events retroactively without having to re-import the data. Here's how you can do it: 1. Use Borrowed Properties: This feature lets you "borrow" a property from any other event and apply it to the event that's missing the property. It works retroactively and can be done at query time.2. Access Borrowed Properties: You can set up Borrowed Properties in the Mixpanel UI. This feature is available to Admin and Owner roles only.3. Create the Borrowed Property: In the UI, you can create a borrowed property by specifying which event and property you want to borrow from.4. Apply to Past Events: Once created, the borrowed property will be applied to all relevant events, including those from the past week that were missing the property.5. Use in Analysis: After setting up the borrowed property, you can use it in your analysis as if it had been tracked with the original event.It's important to note that: - A project can have a maximum of 20 borrowed properties. - Borrowing is limited to the most recent event in a 7-day lookback window. - This method is preferable to re-importing data, especially for recent events.For more detailed information on how to set up and use Borrowed Properties, you can refer to the Mixpanel documentation on Borrowed Properties.This approach allows you to fix the missing properties for events from the past week without having to modify your tracking code or re-import data, making it an efficient solution for your situation.

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