Flutter-Android Studio > Inconsistent JVM-target compatibility detected for tasks 'compileReleaseJavaWithJavac' (1.8) and 'compileReleaseKotlin' (17)

i have been trying to solve this problem for about 4 days now everything was going smooth until one day i updated android studio then the app wont build

i searched for a solution.
Updated kotlin to the lastest version ext.kotlin_version = ‘2.0.20’. still no answer
app/build.gradle :

plugins {
    id "com.android.application"
    id "kotlin-android"
    id "dev.flutter.flutter-gradle-plugin"
}

def localProperties = new Properties()
def localPropertiesFile = rootProject.file('local.properties')
if (localPropertiesFile.exists()) {
    localPropertiesFile.withReader('UTF-8') { reader ->
        localProperties.load(reader)
    }
}

def flutterVersionCode = localProperties.getProperty('flutter.versionCode')
if (flutterVersionCode == null) {
    flutterVersionCode = '1'
}

def flutterVersionName = localProperties.getProperty('flutter.versionName')
if (flutterVersionName == null) {
    flutterVersionName = '1.0'
}

android {
    namespace "trojandc.com.beshoy_nan"
    compileSdkVersion flutter.compileSdkVersion
    ndkVersion flutter.ndkVersion

    compileOptions {
        sourceCompatibility JavaVersion.VERSION_17
        targetCompatibility JavaVersion.VERSION_17
    }

    kotlinOptions {
        jvmTarget = '17'
    }

    sourceSets {
        main.java.srcDirs += 'src/main/kotlin'
    }

    defaultConfig {
        // TODO: Specify your own unique Application ID (https://developer.android.com/studio/build/application-id.html).
        applicationId "trojandc.com.beshoy_nan"
        // You can update the following values to match your application needs.
        // For more information, see: https://docs.flutter.dev/deployment/android#reviewing-the-gradle-build-configuration.
        minSdkVersion 23
        targetSdkVersion flutter.targetSdkVersion
        versionCode flutterVersionCode.toInteger()
        versionName flutterVersionName
        multiDexEnabled true

    }

    buildTypes {
        release {
            // TODO: Add your own signing config for the release build.
            // Signing with the debug keys for now, so `flutter run --release` works.
            signingConfig signingConfigs.debug
        }
    }
}

flutter {
    source '../..'
}

dependencies {
    implementation 'androidx.multidex:multidex:2.0.1'
}

android/build.gradle :

buildscript {
    ext.kotlin_version = '2.0.20'
    repositories {
        google()
        mavenCentral()
    }

    dependencies {
        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
    }
}

allprojects {
    repositories {
        google()
        mavenCentral()
    }
}

rootProject.buildDir = '../build'
subprojects {
    project.buildDir = "${rootProject.buildDir}/${project.name}"
}
subprojects {
    project.evaluationDependsOn(':app')
}

tasks.register("clean", Delete) {
    delete rootProject.buildDir
}

gradle.properties :

org.gradle.jvmargs=-Xmx1536m -Duser.country=US -Duser.language=en
android.useAndroidX=true
android.enableJetifier=true
kotlin.daemon.jvm.options=-Xmx2g

gradle-wrapper.properties :

distributionBase=GRADLE_USER_HOME
distributionPath=wrapper/dists
zipStoreBase=GRADLE_USER_HOME
zipStorePath=wrapper/dists
distributionUrl=https://services.gradle.org/distributions/gradle-8.10-all.zip

settings.gradle :

pluginManagement {
    def flutterSdkPath = {
        def properties = new Properties()
        file("local.properties").withInputStream { properties.load(it) }
        def flutterSdkPath = properties.getProperty("flutter.sdk")
        assert flutterSdkPath != null, "flutter.sdk not set in local.properties"
        return flutterSdkPath
    }
    settings.ext.flutterSdkPath = flutterSdkPath()

    includeBuild("${settings.ext.flutterSdkPath}/packages/flutter_tools/gradle")

    repositories {
        google()
        mavenCentral()
        gradlePluginPortal()
    }

    plugins {
        id "dev.flutter.flutter-gradle-plugin" version "1.0.0" apply false
    }
}

plugins {
    id "dev.flutter.flutter-plugin-loader" version "1.0.0"
    id "com.android.application" version "7.3.0" apply false
    id "org.jetbrains.kotlin.android" version "2.0.20" apply false
}

include ":app"

error:

FAILURE: Build failed with an exception.

• What went wrong:
  Execution failed for task ‘:image_gallery_saver:compileReleaseKotlin’.

Inconsistent JVM-target compatibility detected for tasks ‘compileReleaseJavaWithJavac’ (1.8) and ‘compileReleaseKotlin’ (17).

Consider using JVM Toolchain: https://kotl.in/gradle/jvm/toolchain
Learn more about JVM-target validation: https://kotl.in/gradle/jvm/target-validation

• Try:

Run with –stacktrace option to get the stack trace.
Run with –info or –debug option to get more log output.
Run with –scan to get full insights.
Get more help at https://help.gradle.org.

BUILD FAILED in 3s
Running Gradle task ‘assembleRelease’… 3.6s
Gradle task assembleRelease failed with exit code 1