Android: Duplicate class found in modules jetified-play-services-measurement and jetified-play-services-measurement-impl

Issue

I am trying to update the dependencies of one of my Android projects and I am getting this strange error.

The culprit is this line, for AdMob (I was previously using 20.6.0):

implementation "com.google.android.gms:play-services-ads:21.0.0"

I get a bunch of errors:

Duplicate class com.google.android.gms.internal.measurement.zzhx found in modules jetified-play-services-measurement-base-20.1.2-runtime (com.google.android.gms:play-services-measurement-base:20.1.2) and jetified-play-services-measurement-impl-20.1.1-runtime (com.google.android.gms:play-services-measurement-impl:20.1.1)

Duplicate class com.google.android.gms.internal.measurement.zzna found in modules jetified-play-services-measurement-base-20.1.2-runtime (com.google.android.gms:play-services-measurement-base:20.1.2) and jetified-play-services-measurement-impl-20.1.1-runtime (com.google.android.gms:play-services-measurement-impl:20.1.1)

Duplicate class com.google.android.gms.internal.measurement.zznb found in modules jetified-play-services-measurement-base-20.1.2-runtime (com.google.android.gms:play-services-measurement-base:20.1.2) and jetified-play-services-measurement-impl-20.1.1-runtime (com.google.android.gms:play-services-measurement-impl:20.1.1)

Duplicate class com.google.android.gms.internal.measurement.zznc found in modules jetified-play-services-measurement-base-20.1.2-runtime (com.google.android.gms:play-services-measurement-base:20.1.2) and jetified-play-services-measurement-impl-20.1.1-runtime (com.google.android.gms:play-services-measurement-impl:20.1.1)

...

Here are all the dependencies I'm using in the project's build.gradle (:app):

dependencies {
    implementation "androidx.recyclerview:recyclerview:1.2.1"
    implementation 'androidx.core:core-ktx:1.8.0'
    implementation 'androidx.appcompat:appcompat:1.4.2'
    implementation 'com.google.android.material:material:1.6.1'
    implementation 'androidx.constraintlayout:constraintlayout:2.1.4'
    implementation 'androidx.legacy:legacy-support-v4:1.0.0'
    androidTestImplementation 'androidx.test.ext:junit:1.1.3'
    androidTestImplementation 'androidx.test.espresso:espresso-core:3.4.0'
    // Firebase & Crashlytics
    implementation platform('com.google.firebase:firebase-bom:29.2.1')
    implementation 'com.google.firebase:firebase-analytics-ktx'
    implementation 'com.google.firebase:firebase-crashlytics-ktx'
    //Navigation
    implementation "androidx.navigation:navigation-fragment-ktx:2.4.2"
    implementation "androidx.navigation:navigation-ui-ktx:2.4.2"
    // AdMob
    implementation "com.google.android.gms:play-services-ads:21.0.0"
    // Style
    implementation 'com.intuit.sdp:sdp-android:1.0.5'
    // Play Core
    implementation 'com.google.android.play:core:1.10.3'
    implementation 'com.google.android.play:core-ktx:1.8.1'
    // Billing
    implementation "com.android.billingclient:billing-ktx:5.0.0"
}

And the dependencies in build.gradle (My App):

buildscript {
    repositories {
        google()
        mavenCentral()
    }
    dependencies {
        classpath "com.android.tools.build:gradle:7.1.3"
        classpath "androidx.navigation:navigation-safe-args-gradle-plugin:2.4.2"
        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:1.6.21"
        classpath "com.google.gms:google-services:4.3.10"
        classpath "com.google.firebase:firebase-crashlytics-gradle:2.8.1"
    }
}

What is causing this error? If I revert play-services-ads to 20.6.0 I don't get any error.

Thank you for your help

Solution

you need also to update implementation platform('com.google.firebase:firebase-bom:29.2.1'), to

 implementation platform('com.google.firebase:firebase-bom:30.1.0')

Answered By - Vahan