Refer to the code in the actionUpdate of a relation scenario for tables:
public function actionUpdate($id)
{
	$model=$this->loadModel($id);
	// Uncomment the following line if AJAX validation is needed
	// $this->performAjaxValidation($model);
	if(isset($_POST['User']))
	{
		$model->attributes=$_POST['User'];
		if($model->save())
		{
			$model->person->attributes=$_POST['Person'];
			$model->person->save();
			
			$this->redirect(array('view','id'=>$model->id));
		}
	}
	$this->render('update',array('model'=>$model,
	));
}
The error proved to be hell of a thing but i realized it arose as a result of table persorn(profile for user) not having a PRIMARY KEY. The tables User and Person have a relation through a FOREIGN KEY. For one to UPDATE the user the tables must be both having a primary key.