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Hi - 

We had previously had the UID anonymized in our amplitude- android integration. But now we have integrated a connection with our Database UID's . So that when a user signs up - it is the same UID on amplitude as our internal Database. 

We are trying to retroactively find a way to get the UID's that were anonymized mapped to the proper UID in the Database. Does anyone have any guidance on how we can retroactively De-Anonymize the UID’s and get them to match the propper UID in the database for each user?

Thanks!
 

Hi @Griffen 

Looks like you are trying to retroactively merge user IDs based on new values?

If that’s the case, then User IDs cannot be merged. If you create/update a new user ID for an existing user, Amplitude will recognize them as different unique users.

Here’s more - https://community.amplitude.com/data%2Dplanning%2Dand%2Dgovernance%2D73/will%2Dsubsequent%2Dcalls%2Doverride%2Dthe%2Dproperty%2Dif%2Dyou%2Dset%2Da%2Dnew%2Duser%2Did%2D2008

The alternate approach will be to reimport your event data with the correctly identified user ids into a new project.

Let me know if I have the correct interpretation of your question.

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