warning: Kotlin runtime JAR files in the classpath should have the same version

Question

I get the following warning, but I\'m not sure where v1.0.6 resides.

Is it possible this error comes from a Kotlin library somehow including an old Kotlin version?

Answer 1

Make sure you use the same version of stdlib-jdk7 & kotlin-gradle-plugin dependencies to avoid warnings.
You can refere below example where stdlib-jdk7 & kotlin-gradle-plugin both have the same version

app-level build.gradle file

dependencies {
    implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:1.4.0"
    ...
}

project-level build.gradle file

buildscript {
    dependencies {
         classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:1.4.0" 
         ...
    }

}