We are having the following error on our Magento 1.6 site.
Stack trace:
exception 'PDOException' with message 'SQLSTATE[23000]: Integrity constraint violation: 1452 Cannot add or update a child row: a foreign key constraint fails (
magento.salesrule_product_attribute, CONSTRAINTFK_81C9080E12F14369F8C7AF39A88AEF48FOREIGN KEY (customer_group_id) REFERENCEScustomer_group(`custome)' in /public_html/lib/Zend/Db/Statement/Pdo.php:228
I'm a frontend developer so any help with this would be appreciated.