devices don't support framework version

I get an error when trying to upload my apk to google playstore

Doesn't support framework version (1562 devices)
safe: "21 and onwards"

What does that mean? Here is my build.gradle

compileSdkVersion 29
buildToolsVersion "29.0.2"
defaultConfig {
    applicationId "com.sumizeit.sumizeit"
    minSdkVersion 21
    targetSdkVersion 29
    versionCode 12
    versionName "12"
    multiDexEnabled true  //ADD THIS LINE
    testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
}