Importing a cloud XML backup to server fails due to table constraint mismatch

2016-12-12 12:03:44,578 JiraImportTaskExecutionThread-1 ERROR xxxxx 723x638x1 1b1wxhy 80.193.64.226,172.31.12.212 /secure/admin/XmlRestore.jspa [c.a.j.bc.dataimport.DefaultDataImportService] Error during ActiveObjects restore
com.atlassian.activeobjects.spi.ActiveObjectsImportExportException: There was an error during import/export with <unknown plugin>:Error executing update for SQL statement 'ALTER TABLE PUBLIC.AO_C7F17E_PROJECT_LANGUAGE ADD CONSTRAINT fk_ao_c7f17e_project_language_project_lang_revision_id FOREIGN KEY (PROJECT_LANG_REVISION_ID) REFERENCES PUBLIC.AO_C7F17E_PROJECT_LANG_REVISION(ID)'
	at com.atlassian.activeobjects.backup.ImportExportErrorServiceImpl.newImportExportSqlException(ImportExportErrorServiceImpl.java:26)
	at com.atlassian.activeobjects.backup.SqlUtils.onSqlException(SqlUtils.java:46)
	at com.atlassian.activeobjects.backup.SqlUtils.executeUpdate(SqlUtils.java:37)
	at com.atlassian.activeobjects.backup.ActiveObjectsForeignKeyCreator.create(ActiveObjectsForeignKeyCreator.java:43)
	at com.atlassian.activeobjects.backup.ForeignKeyAroundImporter.after(ForeignKeyAroundImporter.java:26)
	at com.atlassian.dbexporter.importer.AbstractImporter.importNode(AbstractImporter.java:47)
	at com.atlassian.dbexporter.DbImporter.importData(DbImporter.java:69)
	at com.atlassian.activeobjects.backup.ActiveObjectsBackup.restore(ActiveObjectsBackup.java:151)
	at com.atlassian.jira.bc.dataimport.DefaultDataImportService.restoreActiveObjects(DefaultDataImportService.java:554)
	at com.atlassian.jira.bc.dataimport.DefaultDataImportService.performImport(DefaultDataImportService.java:728)
	at com.atlassian.jira.bc.dataimport.DefaultDataImportService.doImport(DefaultDataImportService.java:324)
	at com.atlassian.jira.web.action.setup.DataImportAsyncCommand.call(DataImportAsyncCommand.java:60)
	at com.atlassian.jira.web.action.setup.DataImportAsyncCommand.call(DataImportAsyncCommand.java:28)
	at com.atlassian.jira.task.ImportTaskManagerImpl$TaskCallableDecorator.call(ImportTaskManagerImpl.java:157)
	at com.atlassian.jira.task.ImportTaskManagerImpl$TaskCallableDecorator.call(ImportTaskManagerImpl.java:133)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
	at java.lang.Thread.run(Thread.java:745)
Caused by: org.h2.jdbc.JdbcSQLException: Table "AO_C7F17E_PROJECT_LANG_REVISION" not found; SQL statement:
ALTER TABLE PUBLIC.AO_C7F17E_PROJECT_LANGUAGE ADD CONSTRAINT fk_ao_c7f17e_project_language_project_lang_revision_id FOREIGN KEY (PROJECT_LANG_REVISION_ID) REFERENCES PUBLIC.AO_C7F17E_PROJECT_LANG_REVISION(ID) [42102-185]
	at org.h2.message.DbException.getJdbcSQLException(DbException.java:345)
	at org.h2.message.DbException.get(DbException.java:179)
	at org.h2.message.DbException.get(DbException.java:155)
	at org.h2.schema.Schema.getTableOrView(Schema.java:438)
	at org.h2.command.ddl.AlterTableAddConstraint.update(AlterTableAddConstraint.java:72)
	at org.h2.command.CommandContainer.update(CommandContainer.java:78)
	at org.h2.command.Command.executeUpdate(Command.java:254)
	at org.h2.jdbc.JdbcStatement.executeUpdateInternal(JdbcStatement.java:130)
	at org.h2.jdbc.JdbcStatement.executeUpdate(JdbcStatement.java:115)
	at org.apache.commons.dbcp2.DelegatingStatement.executeUpdate(DelegatingStatement.java:234)
	at org.apache.commons.dbcp2.DelegatingStatement.executeUpdate(DelegatingStatement.java:234)
	at com.atlassian.activeobjects.backup.SqlUtils.executeUpdate(SqlUtils.java:34)
	... 18 more

com.atlassian.activeobjects.internal.ActiveObjectsSqlException: There was a SQL exception thrown by the Active Objects library:
Database:
	- name:PostgreSQL
	- version:9.3.14
	- minor version:3
	- major version:9
Driver:
	- name:PostgreSQL Native Driver
	- version:PostgreSQL 9.1 JDBC4 (build 903)
org.postgresql.util.PSQLException: ERROR: duplicate key value violates unique constraint "AO_60DB71_SPRINT_pkey"
  Detail: Key ("ID")=(<any numbers>) already exists.