compiled with an incompatible version of Kotlin. The binary version of its metadata is 1.8.0, expected version is 1.6.0

Question

I am rebuilding my android project which is in java and some classes are written in kotlin. I have search on google but my problem didn't solve. I am getting below error while building my project:

/home/bansal/.gradle/caches/transforms-2/files-2.1/0bea321a20a76ca878f594ef198fedcf/jetified-core-ktx-1.10.0-alpha02-api.jar!/META-INF/core-ktx_release.kotlin_module: Module was compiled with an incompatible version of Kotlin. The binary version of its metadata is 1.8.0, expected version is 1.6.0.

Below is my build.gradel

ext.kotlin_version = '1.6.10'
repositories {
    google()
    jcenter()
    maven {
        url 'http://dl.bintray.com/amulyakhare/maven'
    }
}
dependencies {
    classpath "com.android.tools.build:gradle:4.0.1"
    classpath 'io.realm:realm-gradle-plugin:3.2.1'
    classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:1.6.10"
    classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
    // NOTE: Do not place your application dependencies here; they belong
    // in the individual module build.gradle files
}

and module build.gradle

  compileOptions {
        sourceCompatibility JavaVersion.VERSION_1_8
        targetCompatibility JavaVersion.VERSION_1_8
    }

dependencies{
    implementation 'androidx.core:core-ktx:1.7.0'


    annotationProcessor 'android.arch.lifecycle:compiler:1.1.1'
    implementation 'com.google.android.material:material:1.3.0'
    implementation 'androidx.lifecycle:lifecycle-livedata-ktx:2.3.0'
    implementation 'androidx.legacy:legacy-support-v4:1.0.0'
    implementation 'android.arch.lifecycle:viewmodel:1.1.1'
    implementation 'android.arch.lifecycle:extensions:1.1.1'

    //Coroutines
    implementation 'org.jetbrains.kotlinx:kotlinx-coroutines-android:1.5.1'
    implementation "androidx.lifecycle:lifecycle-viewmodel-ktx:2.2.0"
    implementation "androidx.core:core-ktx:+"
    implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
}

Tried solutiuon: Module was compiled with an incompatible version of Kotlin. The binary version of its metadata is 1.5.1, expected version is 1.1.15

Answer 1

This same issue i got before a few days .. and solution is too easy for this

In your build.gradle file (which you pasted first) , same classpath is written twice so remove any once of them

From

classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:1.6.10" // you can remove this
classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"

In your module level build.gradle file , same dependency is mentioned twice

From

implementation 'androidx.core:core-ktx:1.7.0'
implementation "androidx.core:core-ktx:+" // you can remove this

sync gradle and try to run to your project

Answer 2

I had a similar problem and found a dissimilar solution. Android Studio suggested I update to Electric Eel from Dolphin. Figuring things couldn't get worse, I did it, and ta da - the problem went away!