repository comments may not be deleted on repository deletion

2014-07-11 13:14:04,392 ERROR [qtp1324262781-422 ] com.atlassian.event.internal.AsynchronousAbleEventDispatcher AsynchronousAbleEventDispatcher$1$1-run - There was an exception thrown trying to dispatch event [com.atlassian.fisheye.event.RepositoryDeletedEventImpl@7af6eac8] from the invoker [SingleParameterMethodListenerInvoker{method=public void com.atlassian.fisheye.model.managers.DefaultChangesetCommentManager.onRepositoryDeleted(com.atlassian.fisheye.event.RepositoryDeletedEvent), listener=com.atlassian.fisheye.model.managers.DefaultChangesetCommentManager@2b4bcd6e}]
java.lang.RuntimeException: could not execute update query
...
Caused by: org.hibernate.exception.ConstraintViolationException: could not execute update query
        at org.hibernate.exception.SQLStateConverter.convert(SQLStateConverter.java:96)
        at org.hibernate.exception.JDBCExceptionHelper.convert(JDBCExceptionHelper.java:66)
        at org.hibernate.hql.ast.exec.BasicExecutor.execute(BasicExecutor.java:110)
        at org.hibernate.hql.ast.QueryTranslatorImpl.executeUpdate(QueryTranslatorImpl.java:421)
        at org.hibernate.engine.query.HQLQueryPlan.performExecuteUpdate(HQLQueryPlan.java:283)
        at org.hibernate.impl.SessionImpl.executeUpdate(SessionImpl.java:1278)
        at org.hibernate.impl.QueryImpl.executeUpdate(QueryImpl.java:117)
        at com.atlassian.fisheye.model.managers.DefaultChangesetCommentManager$5.doInTransaction(DefaultChangesetCommentManager.java:236)
        at com.atlassian.fisheye.model.managers.DefaultChangesetCommentManager$5.doInTransaction(DefaultChangesetCommentManager.java:233)
        at com.atlassian.fisheye.spi.impl.DefaultTxTemplate.execute(DefaultTxTemplate.java:108)
        at sun.reflect.GeneratedMethodAccessor193.invoke(Unknown Source)
...
Caused by: java.sql.SQLException: Integrity constraint violation FK1C588BB9195A8AC5 table: CRU_CHANGESET_COMMENT in statement [delete from cru_changeset_comment where cru_repository=?]
        at org.hsqldb.jdbc.Util.throwError(Unknown Source)
        at org.hsqldb.jdbc.jdbcPreparedStatement.executeUpdate(Unknown Source)
        at com.jolbox.bonecp.PreparedStatementHandle.executeUpdate(PreparedStatementHandle.java:203)
        at org.hibernate.hql.ast.exec.BasicExecutor.execute(BasicExecutor.java:101)
        ... 200 more

alter table cru_changeset_comment add constraint FK1C588BB9195A8AC5 foreign key (cru_reply_to_comment_id) references cru_changeset_comment;