XF 1.5 Importing XF to XF Error on Nodes And Posts

[NickM22]

All the steps prior have worked but when I click that option I get this.

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 1627
9. XenForo_Model_Import->importThread() in XenForo/Importer/XenForo.php at line 1801
10. XenForo_Importer_XenForo->stepThreads() in XenForo/Importer/Abstract.php at line 124
11. XenForo_Importer_Abstract->runStep() in XenForo/ControllerAdmin/Import.php at line 189
12. XenForo_ControllerAdmin_Import->_runStep() in XenForo/ControllerAdmin/Import.php at line 241
13. XenForo_ControllerAdmin_Import->_startStep() in XenForo/ControllerAdmin/Import.php at line 184
14. XenForo_ControllerAdmin_Import->actionStartStep() in XenForo/FrontController.php at line 351
15. XenForo_FrontController->dispatch() in XenForo/FrontController.php at line 134
16. XenForo_FrontController->run() in /home4/bazzaro/public_html/pbforums/admin.php at line 13