Skip the parent module.

Jenkinsfile

@@ -52,8 +52,10 @@ pipeline {
                     report['downstream_modules'] = [:]
                     report['downstream_projects'] = []
                     report['downstream_modules']['L1'] = [:]
-                    projects2artifacts[inputProject].each { a -> report = analyzeDependency(modules2deps, artifacts2projects, report, a, 1) }
-
+                    projects2artifacts[inputProject].each { a ->
+                         if (a.name.split(':').length > 1) { //skip the parent (only groupId)
+                            report = analyzeDependency(modules2deps, artifacts2projects, report, a, 1) }
+                         }
                 }
             }
         }