Release fails while creating SCM-TAG for module of a multi module project

Release fails while creating SCM-TAG for module of a multi module project. I tried it first with continuum 1.2.3 and then with 1.3.2 with the same result. There seems to be the scm tag already exists, but before releasing was started, there was not such a tag.

[INFO] Multi Module Maven Demo ............................... SUCCESS [5.532s]
[INFO] Module1 ............................................... SUCCESS [8.125s]
[INFO] Module2 ............................................... SUCCESS [5.235s]
[INFO] ------------------------------------------------------------------------
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESSFUL
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 20 seconds
[INFO] Finished at: Fri May 08 11:12:21 CEST 2009
[INFO] Final Memory: 35M/127M
[INFO] ------------------------------------------------------------------------
[ERROR] org.apache.maven.shared.release.scm.ReleaseScmCommandException: Unable to tag SCM
Provider message:
The svn tag command failed.
Command output:
svn: Commit failed (details follow):
svn: File '/svn/test_x/tags/MultiModuleMavenDemo-0.0.4/Module1/pom.xml' already exists

at org.apache.maven.shared.release.phase.ScmTagPhase.execute(ScmTagPhase.java:99)
at org.apache.maven.shared.release.DefaultReleaseManager.prepare(DefaultReleaseManager.java:194)
at org.apache.maven.shared.release.DefaultReleaseManager.prepareWithResult(DefaultReleaseManager.java:107)
at org.apache.maven.continuum.release.executors.PrepareReleaseTaskExecutor.execute(PrepareReleaseTaskExecutor.java:44)
at org.apache.maven.continuum.release.executors.AbstractReleaseTaskExecutor.executeTask(AbstractReleaseTaskExecutor.java:68)
at org.codehaus.plexus.taskqueue.execution.ThreadedTaskQueueExecutor$ExecutorRunnable$1.run(ThreadedTaskQueueExecutor.java:116)
at edu.emory.mathcs.backport.java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:442)
at edu.emory.mathcs.backport.java.util.concurrent.FutureTask.run(FutureTask.java:178)
at edu.emory.mathcs.backport.java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1061)
at edu.emory.mathcs.backport.java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:575)
at java.lang.Thread.run(Thread.java:619)