SQLSTATE[23000] Magento Error

SQLSTATE[23000]: Integrity constraint violation: 1452 Cannot add or update a child row: a foreign key constrain

#0 C:\st\sweettoothio\www\1ib\Varien\Db\Statement\Pdo\Mysq1.php(110): Zend_Db_Statement_Pdo->_execute(Array)
#1 C:\st\sweettoothio\www\1ib\Zend\Db\Statement.php(300): Varien_Db_Statement_Pdo_Mysq1->_execute(Array)
#2 C:\st\sweettoothio\www\1ib\Zend\Db\Adapter\Abstract.php(479): Zend_Db_Statement->execute(Array)
#3 C:\st\sweettoothio\www\1ib\Zend\Db\Adapter\Pdo\Abstract.php(238): Zend_Db_Adapter_Abstract->query(‘INSERT It
#4 C:\st\sweettoothio\www\1ib\Varien\Db\Adapter\Pdo\Mysq1.php(389): Zend_Db_Adapter_Pdo_Abstract->query(‘INSER1
#5 C:\st\sweettoothio\www\1ib\Zend\Db\Adapter\Abstract.php(574): Varien_Db_Adapter_Pdo_Mysq1->query(‘INSERT IN1
#6 C:\st\sweettoothio\www\app\code\core\Mage\Core\Model\Resource\Db\Abstract.php(448): Zend_Db_Adapter_Abstract
#7 C:\st\sweettoothio\www\app\code\core\Mage\Core\Model\Abstract.php(318): Mage_Core_Mode1_Resource_Db_Abstract
#8 C:\st\sweettoothio\www\app\code\commnnity\ST\Admin\contro11ers\Channe1\OauthContro11er.php(28): Mage_Core_Mc
#9 C:\st\sweettoothio\www\app\code\commnnity\ST\Xero\contro11ers\ApiContro11er.php(26): ST_Admin_Channe1_Oauth(
#10 C:\st\sweettoothio\www\app\code\core\Mage\Core\Contro11er\Varien\Action.php(420): ST_Xero_ApiController->oe
#11 C:\st\sweettoothio\www\app\code\core\Mage\Core\Contro11er\Varien\Router\Standard.php(250): Mage_Core_Contrc
#12 C:\st\sweettoothio\www\app\code\core\Mage\Core\Contro11er\Varien\Front.php(176): Mage_Core_Contro11er_Varie
#13 C:\st\sweettoothio\www\app\code\core\Mage\Core\Mode1\App.php(349): Mage_Core_Contro11er_Varien_Front->dispe
#14 C:\st\sweettoothio\www\app\Mage.php(640): Mage_Core_Mode1_App->run(Array)
#15 C:\st\sweettoothio\www\index.php(127): Mage::run(“, ‘store’)
#16 {main}