Recently I received an email from Google saying that there was now support for buying apps in Reais and that I should migrate my developer account. I followed the steps as described in the email and all my apps were migrated to my new developer account.
However, when I uploaded a new apk using the same key I've always used, I'm getting a message that the SHA1 certificate is different. I've already backed up my key and the same error still occurs.
Some things have changed since the last apk I had loaded.
android-support-v7-appcompat
to my project (I followed the google developer's own tutorial)