Caused by: org.spockframework.runtime.extension.ExtensionException: Duplicated Extension declaration for [org.grails.testing.gorm.spock.GormTestingSupportExtension]
Source 1: jar:file:~/.gradle/caches/modules-2/files-2.1/org.grails/grails-gorm-testing-support/9.0.0-M3/d6ff8c5a8cb64c1f0d515dbfd939063ce1d9accd/grails-gorm-testing-support-9.0.0-M3.jar!/META-INF/services/org.spockframework.runtime.extension.IGlobalExtension
Source 2: jar:file:/.gradle/caches/modules-2/files-2.1/org.apache.grails/grails-testing-support-datamapping/7.0.0-M4/3cb11dcbd3b83c7c44fbec7e4e0f74326d152976/grails-testing-support-datamapping-7.0.0-M4.jar!/META-INF/services/org.spockframework.runtime.extension.IGlobalExtension
This is most likely caused by having two different version of a library on the classpath.

// build.gradle
allprojects {  
    configurations.all {  
        resolutionStrategy {  
            dependencySubstitution {  
                // FIX io.github.longwa:build-test-data until new release                substitute module("org.grails:grails-gorm-testing-support") using module("org.apache.grails:grails-testing-support-datamapping:$grailsVersion")  
                substitute module("org.grails:grails-databinding") using module("org.apache.grails.databinding:grails-databinding-core:$grailsVersion")
            }  
        }
    }
}