Getting TOO_MANY_REGISTRATIONS error from OneSignal (FCM Token Fetching)

[gnanavelcoderays]

Description

I am using OneSignal for push notifications in my Android application.
I am not calling FirebaseMessaging.getToken() anywhere in my code.
I rely only on OneSignal to fetch and manage the FCM token.

However, I still keep getting this error:

java.io.IOException: TOO_MANY_REGISTRATIONS

This error appears repeatedly in the logs during app startup, even after ensuring:

OneSignal is initialized only in the Application class

I am not initializing OneSignal in any Activity or Fragment

No background service is initializing OneSignal

No multiple processes in AndroidManifest.xml

I am not using FirebaseMessaging.getToken() manually

But the error continues to appear.

Additionally:
I checked the device in the OneSignal User Dashboard — it shows “Status: Never Subscribed”. ✅ This is the major problem.