Space import failing with the error message "could not execute statement"

@40000000582db878227ba10c com.atlassian.confluence.importexport.ImportExportException: com.atlassian.confluence.importexport.ImportExportException: Unable to complete import: Error while importing backup: org.hibernate.exception.ConstraintViolationException: could not execute statement
@40000000582db878227be75c 	at com.atlassian.confluence.importexport.xmlimport.BackupImporter.importEntities(BackupImporter.java:416)
@40000000582db878227be75c 	at com.atlassian.confluence.importexport.xmlimport.BackupImporter.importEverything(BackupImporter.java:377)
@40000000582db878227c1254 	at com.atlassian.confluence.importexport.xmlimport.FileBackupImporter.importEverything(FileBackupImporter.java:145)
@40000000582db878227c1254 	at com.atlassian.confluence.importexport.xmlimport.BackupImporter$1.doInTransactionWithoutResult(BackupImporter.java:263)
@40000000582db878227c29c4 	at org.springframework.transaction.support.TransactionCallbackWithoutResult.doInTransaction(TransactionCallbackWithoutResult.java:34)
@40000000582db878227c29c4 	at com.atlassian.confluence.importexport.xmlimport.RestorePluginStateStoreTransactionCallbackDecorator.doInTransaction(RestorePluginStateStoreTransactionCallbackDecorator.java:46)
@40000000582db878227c3964 	at com.atlassian.confluence.importexport.xmlimport.RestoreBandanaValuesTransactionCallbackDecorator.doInTransaction(RestoreBandanaValuesTransactionCallbackDecorator.java:50)
@40000000582db878227c3d4c 	at org.springframework.transaction.support.TransactionTemplate.execute(TransactionTemplate.java:133)
@40000000582db878227c4904 	at com.atlassian.confluence.importexport.xmlimport.BackupImporter.doImportInternal(BackupImporter.java:225)
@40000000582db878227c4cec 	at com.atlassian.confluence.importexport.Importer.doImport(Importer.java:75)
@40000000582db878227c4cec 	at com.atlassian.confluence.importexport.DefaultImportExportManager.performImportInternal(DefaultImportExportManager.java:96)
@40000000582db878227c58a4 	at com.atlassian.confluence.importexport.DefaultImportExportManager.doPerformImport(DefaultImportExportManager.java:87)
@40000000582db878227c6c2c 	at com.atlassian.confluence.importexport.DefaultImportExportManager.performImport(DefaultImportExportManager.java:82)
@40000000582db878227c6c2c 	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
@40000000582db878227c7014 	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
@40000000582db878227c7014 	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
@40000000582db878227c7fb4 	at java.lang.reflect.Method.invoke(Method.java:498)
@40000000582db878227c7fb4 	at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:302)
@40000000582db878227c839c 	at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:190)
@40000000582db878227c839c 	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:157)
@40000000582db878227c8f54 	at org.springframework.transaction.interceptor.TransactionInterceptor$1.proceedWithInvocation(TransactionInterceptor.java:99)
@40000000582db878227c933c 	at org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:281)
@40000000582db878227ca6c4 	at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:96)
@40000000582db878227ca6c4 	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
@40000000582db878227caaac 	at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:208)
@40000000582db878227cb664 	at com.sun.proxy.$Proxy142.performImport(Unknown Source)
@40000000582db878227cb664 	at com.atlassian.confluence.importexport.actions.ImportLongRunningTask.runInternal(ImportLongRunningTask.java:68)
@40000000582db878227cba4c 	at com.atlassian.confluence.util.longrunning.ConfluenceAbstractLongRunningTask.run(ConfluenceAbstractLongRunningTask.java:45)
@40000000582db878227cba4c 	at com.atlassian.confluence.util.longrunning.ManagedTask.run(ManagedTask.java:52)
@40000000582db878227cc9ec 	at com.atlassian.confluence.impl.util.concurrent.ConfluenceExecutors$ThreadLocalContextTaskWrapper.lambda$wrap$1(ConfluenceExecutors.java:89)
@40000000582db878227cc9ec 	at com.atlassian.confluence.vcache.VCacheRequestContextOperations.lambda$doInRequestContext$0(VCacheRequestContextOperations.java:49)
@40000000582db878227ce544 	at com.atlassian.confluence.impl.vcache.VCacheRequestContextManager.doInRequestContext(VCacheRequestContextManager.java:87)
@40000000582db878227ce92c 	at com.atlassian.confluence.impl.vcache.VCacheRequestContextManager.doInRequestContext(VCacheRequestContextManager.java:77)
@40000000582db878227ce92c 	at com.atlassian.confluence.vcache.VCacheRequestContextOperations.doInRequestContext(VCacheRequestContextOperations.java:48)
@40000000582db878227cf8cc 	at com.atlassian.confluence.vcache.VCacheRequestContextOperations.lambda$withRequestContext$2(VCacheRequestContextOperations.java:65)
@40000000582db878227cf8cc 	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
@40000000582db878227cfcb4 	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
@40000000582db878227cfcb4 	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
@40000000582db878227d0c54 	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
@40000000582db878227d0c54 	at java.lang.Thread.run(Thread.java:745)
@40000000582db878227d0c54 Caused by: com.atlassian.confluence.importexport.ImportExportException: Unable to complete import: Error while importing backup: org.hibernate.exception.ConstraintViolationException: could not execute statement
@40000000582db878227d1fdc 	at com.atlassian.confluence.importexport.xmlimport.DefaultXmlImporter.doImport(DefaultXmlImporter.java:67)
@40000000582db878227d1fdc 	at com.atlassian.confluence.importexport.xmlimport.BackupImporter.importEntities(BackupImporter.java:408)
@40000000582db878227d23c4 	... 39 more
@40000000582db878227d2f7c Caused by: org.xml.sax.SAXException: Error while importing backup: org.hibernate.exception.ConstraintViolationException: could not execute statement
@40000000582db878227d3364 net.sf.hibernate.HibernateException: org.hibernate.exception.ConstraintViolationException: could not execute statement
@40000000582db878227d3364 	at com.atlassian.confluence.importexport.xmlimport.parser.BackupParser.endElement(BackupParser.java:45)
@40000000582db878227d374c 	at org.apache.xerces.parsers.AbstractSAXParser.endElement(Unknown Source)
@40000000582db878227d4304 	at org.apache.xerces.impl.XMLDocumentFragmentScannerImpl.scanEndElement(Unknown Source)
@40000000582db878227d4304 	at org.apache.xerces.impl.XMLDocumentFragmentScannerImpl$FragmentContentDispatcher.dispatch(Unknown Source)
@40000000582db878227d46ec 	at org.apache.xerces.impl.XMLDocumentFragmentScannerImpl.scanDocument(Unknown Source)
@40000000582db878227d46ec 	at org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source)
@40000000582db878227d568c 	at org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source)
@40000000582db878227d5a74 	at org.apache.xerces.parsers.XMLParser.parse(Unknown Source)
@40000000582db878227d5a74 	at org.apache.xerces.parsers.AbstractSAXParser.parse(Unknown Source)
@40000000582db878227d5a74 	at org.apache.xerces.jaxp.SAXParserImpl$JAXPSAXParser.parse(Unknown Source)
@40000000582db878227d5e5c 	at com.atlassian.security.xml.RestrictedXMLReader.parse(RestrictedXMLReader.java:103)
@40000000582db878227d6a14 	at com.atlassian.confluence.importexport.xmlimport.DefaultXmlImporter.parseBackup(DefaultXmlImporter.java:89)
@40000000582db878227d6dfc 	at com.atlassian.confluence.importexport.xmlimport.DefaultXmlImporter.doImport(DefaultXmlImporter.java:54)
@40000000582db878227d6dfc 	... 40 more
@40000000582db878227d6dfc Caused by: net.sf.hibernate.HibernateException: org.hibernate.exception.ConstraintViolationException: could not execute statement
@40000000582db878227d7d9c 	at org.hibernate.internal.ExceptionConverterImpl.convert(ExceptionConverterImpl.java:147)
@40000000582db878227d7d9c 	at org.hibernate.internal.ExceptionConverterImpl.convert(ExceptionConverterImpl.java:155)
@40000000582db878227d8184 	at org.hibernate.internal.ExceptionConverterImpl.convert(ExceptionConverterImpl.java:162)
@40000000582db878227d9cdc 	at com.atlassian.hibernate.util.SessionHelper.flushAllowNoTransaction(SessionHelper.java:83)
@40000000582db878227d9cdc 	at com.atlassian.hibernate.adapter.adapters.session.SessionV2Adapter.flush(SessionV2Adapter.java:135)
@40000000582db878227d9cdc 	at com.atlassian.confluence.importexport.xmlimport.HibernateImportProcessorContext.flushIfNeeded(HibernateImportProcessorContext.java:174)
@40000000582db878227dac7c 	at com.atlassian.confluence.importexport.xmlimport.HibernateImportProcessorContext.objectImported(HibernateImportProcessorContext.java:59)
@40000000582db878227dac7c 	at com.atlassian.confluence.importexport.xmlimport.DefaultImportProcessor.persist(DefaultImportProcessor.java:44)
@40000000582db878227db064 	at com.atlassian.confluence.importexport.xmlimport.DefaultImportProcessor.processObject(DefaultImportProcessor.java:34)
@40000000582db878227dd38c 	at com.atlassian.confluence.importexport.xmlimport.parser.BackupParser.endElement(BackupParser.java:43)
@40000000582db878227dd774 	... 52 more
@40000000582db878227dd774 Caused by: org.hibernate.exception.ConstraintViolationException: could not execute statement
@40000000582db878227ddb5c 	at org.hibernate.exception.internal.SQLStateConversionDelegate.convert(SQLStateConversionDelegate.java:112)
@40000000582db878227deafc 	at org.hibernate.exception.internal.StandardSQLExceptionConverter.convert(StandardSQLExceptionConverter.java:42)
@40000000582db878227deee4 	at org.hibernate.engine.jdbc.spi.SqlExceptionHelper.convert(SqlExceptionHelper.java:111)
@40000000582db878227deee4 	at org.hibernate.engine.jdbc.spi.SqlExceptionHelper.convert(SqlExceptionHelper.java:97)
@40000000582db878227deee4 	at org.hibernate.engine.jdbc.internal.ResultSetReturnImpl.executeUpdate(ResultSetReturnImpl.java:207)
@40000000582db878227dfe84 	at org.hibernate.engine.jdbc.batch.internal.NonBatchingBatch.addToBatch(NonBatchingBatch.java:45)
@40000000582db878227dfe84 	at org.hibernate.persister.entity.AbstractEntityPersister.insert(AbstractEntityPersister.java:2934)
@40000000582db878227e026c 	at org.hibernate.persister.entity.AbstractEntityPersister.insert(AbstractEntityPersister.java:3434)
@40000000582db878227e026c 	at org.hibernate.action.internal.EntityInsertAction.execute(EntityInsertAction.java:89)
@40000000582db878227e120c 	at org.hibernate.engine.spi.ActionQueue.executeActions(ActionQueue.java:582)
@40000000582db878227e120c 	at org.hibernate.engine.spi.ActionQueue.executeActions(ActionQueue.java:456)
@40000000582db878227e120c 	at org.hibernate.event.internal.AbstractFlushingEventListener.performExecutions(AbstractFlushingEventListener.java:337)
@40000000582db878227e2594 	at org.hibernate.event.internal.DefaultFlushEventListener.onFlush(DefaultFlushEventListener.java:39)
@40000000582db878227e2594 	at com.atlassian.hibernate.util.SessionHelper.flushAllowNoTransaction(SessionHelper.java:80)
@40000000582db878227e297c 	... 58 more
@40000000582db878227e297c Caused by: org.postgresql.util.PSQLException: ERROR: duplicate key value violates unique constraint "uk_jp1ad5yufsih5r7lqrygakpug"
@40000000582db878227e3534 	at org.postgresql.core.v3.QueryExecutorImpl.receiveErrorResponse(QueryExecutorImpl.java:2157)
@40000000582db878227e391c 	at org.postgresql.core.v3.QueryExecutorImpl.processResults(QueryExecutorImpl.java:1886)
@40000000582db878227e391c 	at org.postgresql.core.v3.QueryExecutorImpl.execute(QueryExecutorImpl.java:255)
@40000000582db878227e3d04 	at org.postgresql.jdbc2.AbstractJdbc2Statement.execute(AbstractJdbc2Statement.java:555)
@40000000582db878227e48bc 	at org.postgresql.jdbc2.AbstractJdbc2Statement.executeWithFlags(AbstractJdbc2Statement.java:417)
@40000000582db878227e48bc 	at org.postgresql.jdbc2.AbstractJdbc2Statement.executeUpdate(AbstractJdbc2Statement.java:363)
@40000000582db878227e4ca4 	at sun.reflect.GeneratedMethodAccessor275.invoke(Unknown Source)
@40000000582db878227e5c44 	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
@40000000582db878227e5c44 	at java.lang.reflect.Method.invoke(Method.java:498)
@40000000582db878227e602c 	at com.github.gquintana.metrics.proxy.MethodInvocation.proceed(MethodInvocation.java:75)
@40000000582db878227e602c 	at com.github.gquintana.metrics.sql.PreparedStatementProxyHandler.execute(PreparedStatementProxyHandler.java:55)
@40000000582db878227e779c 	at com.github.gquintana.metrics.sql.AbstractStatementProxyHandler.invoke(AbstractStatementProxyHandler.java:61)
@40000000582db878227e779c 	at com.github.gquintana.metrics.proxy.ProxyHandler.invoke(ProxyHandler.java:73)
@40000000582db878227e7b84 	at com.sun.proxy.$Proxy579.executeUpdate(Unknown Source)
@40000000582db878227e7b84 	at sun.reflect.GeneratedMethodAccessor275.invoke(Unknown Source)
@40000000582db878227e873c 	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
@40000000582db878227e8b24 	at java.lang.reflect.Method.invoke(Method.java:498)
@40000000582db878227e8b24 	at org.vibur.dbcp.proxy.AbstractInvocationHandler.targetInvoke(AbstractInvocationHandler.java:153)
@40000000582db878227e8f0c 	at org.vibur.dbcp.proxy.StatementInvocationHandler.processExecute(StatementInvocationHandler.java:141)
@40000000582db878227e9eac 	at org.vibur.dbcp.proxy.StatementInvocationHandler.restrictedInvoke(StatementInvocationHandler.java:83)
@40000000582db878227ea294 	at org.vibur.dbcp.proxy.StatementInvocationHandler.restrictedInvoke(StatementInvocationHandler.java:40)
@40000000582db878227ea294 	at org.vibur.dbcp.proxy.AbstractInvocationHandler.invoke(AbstractInvocationHandler.java:80)
@40000000582db878227ea67c 	at com.sun.proxy.$Proxy579.executeUpdate(Unknown Source)
@40000000582db878227eb234 	at org.hibernate.engine.jdbc.internal.ResultSetReturnImpl.executeUpdate(ResultSetReturnImpl.java:204)
@40000000582db878227eb61c 	... 67 more