Re: [android-developers] Re: getting this error The apk must be signed with the same certificates as the previous version.

Unfortunately not, because I was compiling my apk with Unity, and used an internal manager of keystore (and not knowing anything about jarsigner).
So I unpublish my game and re-publish a new one, with a totaly new keystore and key. It works.
I created a thread on Unity forums to alert them of JDK1.7 issue.
Thanks again.

I hope you have a backup of the original keystore. To change the signature
you only need to change the parameters you pass to jarsigner, not the
actual key. You are required to use the same key if you want to update
the application on the Google Play store.

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