Cloud Firebase Not Received Notification

I am new to Android development. I recently learned how to use Firebase cloud message. I tested it before. Now it does not work. I want to know why FCM is not working.

Last month I published my app live with dependencies

compile 'com.google.firebase:firebase-messaging:9.0.0' 

I tested on multiple devices that the firebase console can successfully send notifications for all devices.

And a week ago, I noticed that there is version 9.0.2, but I have not yet published my application with these new dependencies. Is it true that whenever a new version of firebase messages is superseded by Google, it will cause all devices working with old dependencies to not receive notifications?

 dependencies { compile fileTree(include: ['*.jar'], dir: 'libs') testCompile 'junit:junit:4.12' compile 'com.android.support:appcompat-v7:23.4.0' compile 'com.android.support:design:23.4.0' compile 'com.google.firebase:firebase-messaging:9.0.0' } apply plugin: 'com.google.gms.google-services' 
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