I have a lineageos 14.1 nightly signed (downloaded from the official website) installed on my phone. I built a 14.1 from the sources following the official wiki (tagged unofficial build). Currently I have this message saying to wipe the /data :

Can't install this package on top of incompatible data. Please try another package or run a factory reset

I don't understand why I should wipe my data, I thought that it was only when changing to a different ROM.

I want to know if there is a way to flash an unofficial without losing my data or why is that needed.

1 Answer 1


I found out that the release key is different, so a simple key migration solve it. The steps are explained on the Wiki.

  • Could you please check here, Taknok? Someone had a follow-up question on yours and is asking you for a comment. Thanks!
    – Izzy
    Commented Mar 24, 2019 at 22:19

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