title: Firebase FCM MismatchSenderID
body: <p>I have my client app with Android installed in several devices.
  I also have my Server app that send messages to those apps.
  The problem is that some devices receive the messages and other don't.
  I get the error "<strong>MismatchSenderId</strong>" when sending the message to those devices.</p>
  
  <p>I divided the problem, so I open the firebase console and send notifications to my apps (I have the Token for each of them). So, using the console app, I get errors on the same devices that using my server. But as I said, every device is using the same app. </p>
  
  <p>Any help of the reason?</p>