Cluster safety job throws an exception on system setup

2009-09-17 18:09:30,020 ERROR [DefaultQuartzScheduler_Worker-9] [org.quartz.core.ErrorLogger] schedulerError Job (DEFAULT.ClusterSafetyJob threw an exception.
 -- referer: http://localhost:8080/confluence/setup/setuplicense.action | url: /confluence/setup/setupembeddeddb-default.action | userName: anonymous | action: setupembeddeddb-default
org.quartz.SchedulerException: Job threw an unhandled exception. [See nested exception: java.lang.RuntimeException: More than one cluster safety number in database.]
	at org.quartz.core.JobRunShell.run(JobRunShell.java:214)
	at org.quartz.simpl.SimpleThreadPool$WorkerThread.run(SimpleThreadPool.java:520)
* Nested Exception (Underlying Cause) ---------------
java.lang.RuntimeException: More than one cluster safety number in database.
	at com.atlassian.confluence.cluster.safety.HibernateClusterSafetyDao.getClusterSafetyNumberObject(HibernateClusterSafetyDao.java:40)
	at com.atlassian.confluence.cluster.safety.HibernateClusterSafetyDao.getSafetyNumber(HibernateClusterSafetyDao.java:11)
	at com.atlassian.confluence.cluster.safety.DefaultClusterSafetyManager.verify(DefaultClusterSafetyManager.java:29)
	at sun.reflect.GeneratedMethodAccessor311.invoke(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
	at java.lang.reflect.Method.invoke(Method.java:597)
	at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:304)
	at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:182)
	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:149)
	at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:106)
	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:171)
	at com.atlassian.spring.interceptors.SpringProfilingInterceptor.invoke(SpringProfilingInterceptor.java:16)
	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:171)
	at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:204)
	at $Proxy69.verify(Unknown Source)
	at com.atlassian.confluence.cluster.safety.ClusterSafetyJob.executeJob(ClusterSafetyJob.java:13)
	at com.atlassian.confluence.setup.quartz.AbstractClusterAwareQuartzJobBean.surroundJobExecutionWithLogging(AbstractClusterAwareQuartzJobBean.java:63)
	at com.atlassian.confluence.setup.quartz.AbstractClusterAwareQuartzJobBean.executeInternal(AbstractClusterAwareQuartzJobBean.java:46)
	at org.springframework.scheduling.quartz.QuartzJobBean.execute(QuartzJobBean.java:86)
	at org.quartz.core.JobRunShell.run(JobRunShell.java:203)
	at org.quartz.simpl.SimpleThreadPool$WorkerThread.run(SimpleThreadPool.java:520)