InvalidArtifactRTException thrown in maven-assembly-plugin

erroneous.xml

<plugin>
   <groupid>org.apache.maven.plugins</groupid>
   <artifactid>maven-assembly-plugin</artifactid>
   <configuration>
      <finalname>${project.build.finalName}</finalname>
      <descriptorrefs>
         <descriptorref>jar-with-dependencies</descriptorref>
      </descriptorrefs>
      <appendassemblyid>false</appendassemblyid>
   </configuration>
   <executions>
      <execution>
         <id>make-assembly</id>
         <phase>package</phase>
         <goals>
            <goal>single</goal>
         </goals>
      </execution>
   </executions>
</plugin>

error_log.txt

org.apache.maven.artifact.InvalidArtifactRTException: For artifact {amberate:amberate.rss:0.1:jar}: An attached artifact must have a different ID than its corresponding main artifact. at 
org.apache.maven.project.artifact.AttachedArtifact.<init>(AttachedArtifact.java:51) at 
org.apache.maven.project.DefaultMavenProjectHelper.attachArtifact(DefaultMavenProjectHelper.java:55) at 
org.apache.maven.plugin.assembly.mojos.AbstractAssemblyMojo.execute(AbstractAssemblyMojo.java:295) at 
org.apache.maven.plugin.DefaultPluginManager.executeMojo(DefaultPluginManager.java:579) at 
org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoalAndHandleFailures(DefaultLifecycleExecutor.java:498) at 
org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeTaskSegmentForProject(DefaultLifecycleExecutor.java:265) at 
org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeTaskSegments(DefaultLifecycleExecutor.java:191) at 
org.apache.maven.lifecycle.DefaultLifecycleExecutor.execute(DefaultLifecycleExecutor.java:149) at 
org.apache.maven.DefaultMaven.execute_aroundBody0(DefaultMaven.java:223) at 
org.apache.maven.DefaultMaven.execute_aroundBody1$advice(DefaultMaven.java:304) at 
org.apache.maven.DefaultMaven.execute(DefaultMaven.java:1) at
org.apache.maven.embedder.MavenEmbedder.execute_aroundBody2(MavenEmbedder.java:904) at 
org.apache.maven.embedder.MavenEmbedder.execute_aroundBody3$advice(MavenEmbedder.java:304) at 
org.apache.maven.embedder.MavenEmbedder.execute(MavenEmbedder.java:1) at 
org.apache.maven.cli.MavenCli.doMain(MavenCli.java:176) at 
org.apache.maven.cli.MavenCli.main(MavenCli.java:63) at 
sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at 
java.lang.reflect.Method.invoke(Method.java:597) at 
org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced(Launcher.java:289) at 
org.codehaus.plexus.classworlds.launcher.Launcher.launch(Launcher.java:229) at 
org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode(Launcher.java:408) at 
org.codehaus.plexus.classworlds.launcher.Launcher.main(Launcher.java:351) at 
org.codehaus.classworlds.Launcher.main(Launcher.java:31)

fixed.xml

<plugin>
   <groupid>org.apache.maven.plugins</groupid>
   <artifactid>maven-assembly-plugin</artifactid>
   <version>2.2-beta-4</version>
   <configuration>
      <finalname>${project.build.finalName}</finalname>
      <descriptorrefs>
         <descriptorref>jar-with-dependencies</descriptorref>
      </descriptorrefs>
      <appendassemblyid>false</appendassemblyid>
   </configuration>
   <executions>
      <execution>
         <id>make-assembly</id>
         <phase>package</phase>
         <goals>
            <goal>single</goal>
         </goals>
      </execution>
   </executions>
</plugin>