Fatal error: Uncaught exception 'PDOException' with message 'SQLSTATE[23000]: Integrity constraint violation: 1452 Cannot add or update a child row: a foreign key constraint fails (`ficlivet_db`.`usuario`, CONSTRAINT `id_grupo` FOREIGN KEY (`id_grupo`) REFERENCES `grupo` (`id_grupo`) ON DELETE NO ACTION ON UPDATE NO ACTION)' in C:\xampp\htdocs\ActiveRecord.php:102 Stack trace: #0 C:\xampp\htdocs\ActiveRecord.php(102): PDOStatement->execute() #1 C:\xampp\htdocs\ActiveRecord.php(146): Activerecord->insert() #2 C:\xampp\htdocs\PHP3.php(12): Activerecord->save() #3 {main} thrown in C:\xampp\htdocs\ActiveRecord.php on line 102