SMF'den Xenforo geçerken hata

Merhaba değerli arkadaşlar, ben smfden xenforo import ederken forum konularını aktarmaya başladığımda aşağıdaki hatayı alıyorum. Lütfen yardımcı olun.

Server Error
Mysqli statement execute error : Duplicate entry '1' for key 'PRIMARY'

1. Zend_Db_Statement_Mysqli->_execute() in Zend/Db/Statement.php at line 297
2. Zend_Db_Statement->execute() in Zend/Db/Adapter/Abstract.php at line 479
3. Zend_Db_Adapter_Abstract->query() in Zend/Db/Adapter/Abstract.php at line 574
4. Zend_Db_Adapter_Abstract->insert() in XenForo/DataWriter.php at line 1638
5. XenForo_DataWriter->_insert() in XenForo/DataWriter.php at line 1627
6. XenForo_DataWriter->_save() in XenForo/DataWriter.php at line 1419
7. XenForo_DataWriter->save() in XenForo/Model/Import.php at line 617
8. XenForo_Model_Import->_importData() in XenForo/Model/Import.php at line 1274
9. XenForo_Model_Import->importForum() in XenForo/Importer/SMF.php at line 1380
10. XenForo_Importer_SMF->_importForumTree() in XenForo/Importer/SMF.php at line 1393
11. XenForo_Importer_SMF->_importForumTree() in XenForo/Importer/SMF.php at line 1330
12. XenForo_Importer_SMF->stepForums() in XenForo/Importer/Abstract.php at line 124
13. XenForo_Importer_Abstract->runStep() in XenForo/ControllerAdmin/Import.php at line 189
14. XenForo_ControllerAdmin_Import->_runStep() in XenForo/ControllerAdmin/Import.php at line 241
15. XenForo_ControllerAdmin_Import->_startStep() in XenForo/ControllerAdmin/Import.php at line 184
16. XenForo_ControllerAdmin_Import->actionStartStep() in XenForo/FrontController.php at line 351
17. XenForo_FrontController->dispatch() in XenForo/FrontController.php at line 134
18. XenForo_FrontController->run() in /home/de/public_html/forum/forumm/admin.php at line 13