Duplicate class com.google.firebase.iid.FirebaseInstanceIdReceiver found (BoM 31.0.0)

[thatfiredev]

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Issues filed here should be about bugs in the code in this repository.
If you have a general question, need help debugging, or fall into some
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• For general technical questions, post a question on StackOverflow
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• For help troubleshooting your application that does not fall under one
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[REQUIRED] Step 2: Describe your environment

• Android Studio version: Dolphin
• Firebase Component: Functions, Messaging
• Component version: BoM 31.0.0

[REQUIRED] Step 3: Describe the problem

After upgrading to the BoM 31.0.0, I see the following error in the logcat:

Duplicate class com.google.firebase.iid.FirebaseInstanceIdReceiver found in modules
firebase-iid-20.0.1-runtime (com.google.firebase:firebase-iid:20.0.1)
and firebase-messaging-23.1.0-runtime (com.google.firebase:firebase-messaging:23.1.0)

Steps to reproduce:

Add the BoM, firebase-messaging and firebase-functions dependencies:

    implementation platform('com.google.firebase:firebase-bom:31.0.0')

    implementation 'com.google.firebase:firebase-functions'
    implementation 'com.google.firebase:firebase-messaging'

A current workaround is to also define the iid version explicitly:

    implementation platform('com.google.firebase:firebase-bom:31.0.0')

    implementation 'com.google.firebase:firebase-functions'
    implementation 'com.google.firebase:firebase-messaging'
    implementation 'com.google.firebase:firebase-iid:21.1.0'

But it would be nice if the fix was implemented on the SDK itself.

[ColtonIdle]

Came here to report this. Simply updated BOM and got hit with this error. Thanks for the current workaround @thatfiredev

[KVAMALRAJ]

I am facing same issue, after updating FB Bom to 31.0.1

[mikehardy]

@KVAMALRAJ it was not resolved yet, 31.0.1 only contained a fix to crashlytics crash bug. That's why this issue is still open. The team here will make a fix close the issue, then do a release likely with release notes indicating it is fixed, when it is fixed https://firebase.google.com/support/release-notes/android - here

[ColtonIdle]

This does not seem to be fixed in 31.0.2. Will provide more details in a few, but I just updated and I have the same issue.

[ColtonIdle]

Duplicate class com.google.firebase.iid.FirebaseInstanceIdReceiver found in modules firebase-iid-20.0.1-runtime (com.google.firebase:firebase-iid:20.0.1) and firebase-messaging-23.1.0-runtime (com.google.firebase:firebase-messaging:23.1.0)

Using latest 31.0.2. Lets see if the previous workaround fixes the issue here too

[ColtonIdle]

If I add

implementation("com.google.firebase:firebase-iid:21.1.0")

then were good

[mikehardy]

@ColtonIdle the issue was fixed but the commit is untagged / has not been released yet: d939e63 - so I think you should still expect to see the error + need the workaround