We have a very unpleasant problem on IOS: SystemInfo.deviceUniqueIdentifier changes when we publish new version (forcing app to update).
About 2-5% of users fails to login after update becouse they has new SystemInfo.deviceUniqueIdentifier !
This is extrat update of app, not reinstall.
I don't know how to fix that problem. We can't update app our app due mass login problems!
How to fix this ? Or what to use insted SystemInfo.deviceUniqueIdentifier ?
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