Mysqli statement execute error : Incorrect string value: '\xC3\xC0\xCD\xC4\xCE\xCD...' for column 'account_name' at row 1
...
XenForo_Model_User->updateIdentities() in XenForo/DataWriter/User.php at line 819
XenForo_DataWriter_User->rebuildIdentities() in XenForo/Model/Import.php at line 357...