database validation tools for connfluence

sorry for long story.

some times agom i playef with conflunce api on work system.
and something happens, confluence broken (sorry, i don't reproduce steps)
(i play with creatr/delete user and spaces, and rights)
i fix this situation manualy remove bad user from database (i known, i do wrong)

some time ago, i try backup confluence and recive error message
in web windows i see following error message on red background

2006-06-27 14:01:11,406 ERROR [confluence.importexport.impl.BackupExporter] backupEntities Couldn't backup database data.
net.sf.hibernate.LazyInitializationException: Exception initializing proxy: com.opensymphony.user.provider.hibernate.impl.HibernateUserImpl#171
at net.sf.hibernate.proxy.LazyInitializer.initializeWrapExceptions(LazyInitializer.java:64)
at net.sf.hibernate.proxy.LazyInitializer.getImplementation(LazyInitializer.java:164)
at com.atlassian.confluence.importexport.impl.XMLDatabinder.maybeInitializeIfProxy(XMLDatabinder.java:224)
at com.atlassian.confluence.importexport.impl.XMLDatabinder.associatedObjectFound(XMLDatabinder.java:649)
at com.atlassian.confluence.importexport.impl.XMLDatabinder.expandEntity(XMLDatabinder.java:634)
at com.atlassian.confluence.importexport.impl.XMLDatabinder.collectObjectGraph(XMLDatabinder.java:558)
at com.atlassian.confluence.importexport.impl.XMLDatabinder.toGenericXML(XMLDatabinder.java:133)
at com.atlassian.confluence.importexport.impl.AbstractXmlExporter.backupEntities(AbstractXmlExporter.java:177)
at com.atlassian.confluence.importexport.impl.AbstractXmlExporter.backupEverything(AbstractXmlExporter.java:85)

i see in log file
and see another error message

2006-06-27 14:01:11,390 ERROR [sf.hibernate.proxy.LazyInitializer] initializeWrapExceptions Exception initializing proxy
net.sf.hibernate.ObjectNotFoundException: No row with the given identifier exists: 171, of class: com.opensymphony.user.provider.hibernate.impl.HibernateUserImpl
at net.sf.hibernate.ObjectNotFoundException.throwIfNull(ObjectNotFoundException.java:24)
at net.sf.hibernate.impl.SessionImpl.immediateLoad(SessionImpl.java:1946)
at net.sf.hibernate.proxy.LazyInitializer.initialize(LazyInitializer.java:53)
at net.sf.hibernate.proxy.LazyInitializer.initializeWrapExceptions(LazyInitializer.java:60)
at net.sf.hibernate.proxy.LazyInitializer.getImplementation(LazyInitializer.java:164)
at com.atlassian.confluence.importexport.impl.XMLDatabinder.maybeInitializeIfProxy(XMLDatabinder.java:224)
at com.atlassian.confluence.importexport.impl.XMLDatabinder.associatedObjectFound(XMLDatabinder.java:649)

i manualy add in database user with ID 171, and backup succefuly finished.

i understand, i do wrong
but maybe need some tools for database validation ?
integrity testing ?