Can not add Gradle task war' or Jetty in build file : Tasks with name :clean already exists

Hello,

I am unable to add task war or jetty in build filr. The error is: ca not add task ‘: clean’ as task with that name already exists. here is my build file:

buildscript {

repositories {

mavenCentral()

mavenRepo urls: “http://repository.jboss.org/maven2/

mavenRepo name: “grails”, url: ‘http://repo.grails.org/grails/repo

}

dependencies {

classpath “org.grails:grails-gradle-plugin:1.1.1-SNAPSHOT”,

“org.grails:grails-bootstrap:2.2.0”

} } version = “1.0” grailsVersion=“2.2.0” apply plugin: “grails” apply plugin: “war” apply plugin: “jetty”

repositories {

mavenCentral()

mavenRepo urls: “http://repository.jboss.org/maven2/

mavenRepo name: “grails”, url: ‘http://repo.grails.org/grails/repo’ }

dependencies {

[‘dependencies’, ‘resources’, ‘core’, ‘hibernate’, ‘plugin-datasource’, ‘plugin-domain-class’, ‘plugin-tomcat’, ‘plugin-services’].each { plugin ->

compile “org.grails:grails-$plugin:2.2.0”

}

compile “mysql:mysql-connector-java:5.1.22”,

“org.slf4j:slf4j-api:1.7.2” //

“org.grails:grails-crud:2.2.0”, //

“org.grails:grails-gorm:1.3.7”

bootstrap “org.codehaus.groovy:groovy-all:1.8.6”

}

Gradle is built with groovy 1.8.6 /Ant 1.8.4 Ivy 2.2.0 Java 1.6