Problem when importing a plan from Maven for a second time

2009-11-29 18:45:41,330 INFO [1085098145@qtp-1013059835-7] [AccessLogFilter] admin http://xxxxgold.local:8085/bamboo/admin/importMavenPlanCreatePlan.action 64565kb
2009-11-29 18:45:41,363 WARN [1085098145@qtp-1013059835-7] [JDBCExceptionReporter] SQL Error: -104, SQLState: 23000
2009-11-29 18:45:41,364 ERROR [1085098145@qtp-1013059835-7] [JDBCExceptionReporter] Violation of unique constraint $$: duplicate value(s) for column(s) $$: SYS_CT_108 in statement [insert into BUILD_DEFINITION (BUILD_ID, CREATED_DATE, UPDATED_DATE, XML_DEFINITION_DATA, BUILD_DEFINITION_TYPE, BUILD_DEFINITION_ID) values (?, ?, ?, ?, 'BUILD', ?)]
2009-11-29 18:45:41,364 ERROR [1085098145@qtp-1013059835-7] [SessionImpl] Could not synchronize database state with session
2009-11-29 18:45:41,364 WARN [1085098145@qtp-1013059835-7] [HibernateObjectDao] Problems getting build by key
net.sf.hibernate.exception.GenericJDBCException: could not insert: [com.atlassian.bamboo.build.DefaultBuildDefinitionForBuild#819203]
	at net.sf.hibernate.exception.ErrorCodeConverter.handledNonSpecificException(ErrorCodeConverter.java:90)
	at net.sf.hibernate.exception.ErrorCodeConverter.convert(ErrorCodeConverter.java:79)
	at net.sf.hibernate.exception.JDBCExceptionHelper.convert(JDBCExceptionHelper.java:29)
	at net.sf.hibernate.persister.AbstractEntityPersister.convert(AbstractEntityPersister.java:1331)
	at net.sf.hibernate.persister.EntityPersister.insert(EntityPersister.java:472)
	at net.sf.hibernate.persister.EntityPersister.insert(EntityPersister.java:436)
	at net.sf.hibernate.impl.ScheduledInsertion.execute(ScheduledInsertion.java:37)
	at net.sf.hibernate.impl.SessionImpl.execute(SessionImpl.java:2449)
	at net.sf.hibernate.impl.SessionImpl.executeAll(SessionImpl.java:2435)
	at net.sf.hibernate.impl.SessionImpl.execute(SessionImpl.java:2392)
	at net.sf.hibernate.impl.SessionImpl.autoFlushIfRequired(SessionImpl.java:1821)
	at net.sf.hibernate.impl.SessionImpl.find(SessionImpl.java:3652)
	at net.sf.hibernate.impl.CriteriaImpl.list(CriteriaImpl.java:238)
	at net.sf.hibernate.impl.CriteriaImpl.uniqueResult(CriteriaImpl.java:385)
	at com.atlassian.bamboo.build.BuildHibernateDao.getBuildByKey(BuildHibernateDao.java:40)
	at sun.reflect.GeneratedMethodAccessor116.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 org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:204)
	at $Proxy7.getBuildByKey(Unknown Source)
	at com.atlassian.bamboo.build.HibernateBuildManager.getBuildByKey(HibernateBuildManager.java:77)
	at com.atlassian.bamboo.build.HibernateBuildManager.createBuild(HibernateBuildManager.java:248)
	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.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 com.atlassian.bamboo.security.acegi.intercept.aopalliance.AuthorityOverrideMethodSecurityInterceptor.invoke(AuthorityOverrideMethodSecurityInterceptor.java:30)
	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:171)
	at com.atlassian.bamboo.security.acegi.intercept.aopalliance.AuthorityOverrideMethodSecurityInterceptor.invoke(AuthorityOverrideMethodSecurityInterceptor.java:30)
	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:171)
	at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:106)
	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:171)
	at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:106)
	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:171)
	at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:204)
	at $Proxy13.createBuild(Unknown Source)
	at com.atlassian.bamboo.build.creation.BuildPlanCreationServiceImpl.createBuild(BuildPlanCreationServiceImpl.java:235)
	at com.atlassian.bamboo.build.creation.BuildPlanCreationServiceImpl.createBuild(BuildPlanCreationServiceImpl.java:207)
	at com.atlassian.bamboo.ww2.actions.admin.ImportMavenPlanCreatePlanAction.doExecute(ImportMavenPlanCreatePlanAction.java:120)
	at com.atlassian.bamboo.ww2.BambooActionSupport.execute(BambooActionSupport.java:705)
...

Caused by: java.sql.SQLException: Violation of unique constraint $$: duplicate value(s) for column(s) $$: SYS_CT_108 in statement [insert into BUILD_DEFINITION (BUILD_ID, CREATED_DATE, UPDATED_DATE, XML_DEFINITION_DATA, BUILD_DEFINITION_TYPE, BUILD_DEFINITION_ID) values (?, ?, ?, ?, 'BUILD', ?)]
	at org.hsqldb.jdbc.Util.throwError(Unknown Source)
	at org.hsqldb.jdbc.jdbcPreparedStatement.executeUpdate(Unknown Source)
	at com.mchange.v2.c3p0.impl.NewProxyPreparedStatement.executeUpdate(NewProxyPreparedStatement.java:105)
	at net.sf.hibernate.impl.NonBatchingBatcher.addToBatch(NonBatchingBatcher.java:22)
	at net.sf.hibernate.persister.EntityPersister.insert(EntityPersister.java:462)
	... 178 more

java.lang.IllegalArgumentException: object cannot be null
	at org.springframework.util.Assert.notNull(Assert.java:112)
	at com.atlassian.bamboo.security.acegi.acls.HibernateObjectIdentityImpl.(HibernateObjectIdentityImpl.java:58)
	at com.atlassian.bamboo.build.HibernateBuildManager.createBuild(HibernateBuildManager.java:249)
	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.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 com.atlassian.bamboo.security.acegi.intercept.aopalliance.AuthorityOverrideMethodSecurityInterceptor.invoke(AuthorityOverrideMethodSecurityInterceptor.java:30)
	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:171)
	at com.atlassian.bamboo.security.acegi.intercept.aopalliance.AuthorityOverrideMethodSecurityInterceptor.invoke(AuthorityOverrideMethodSecurityInterceptor.java:30)
	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:171)
	at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:106)
	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:171)
	at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:106)
	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:171)
	at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:204)
	at $Proxy13.createBuild(Unknown Source)
	at com.atlassian.bamboo.build.creation.BuildPlanCreationServiceImpl.createBuild(BuildPlanCreationServiceImpl.java:235)
	at com.atlassian.bamboo.build.creation.BuildPlanCreationServiceImpl.createBuild(BuildPlanCreationServiceImpl.java:207)
	at com.atlassian.bamboo.ww2.actions.admin.ImportMavenPlanCreatePlanAction.doExecute(ImportMavenPlanCreatePlanAction.java:120)