Adding a warning On subscription deletion for item

Adding a warning On subscription deletion for item

If we really wanted to delete all items linked to a subscription when we delete a subscription
we should change the database structure as such :
ALTER TABLE serialitems ADD FOREIGN KEY ( itemnumber ) REFERENCES items (itemnumber) ON DELETE CASCADE ;
ALTER TABLE serial CHANGE subscriptionid subscriptionid INT( 11 ) NOT NULL
ALTER TABLE serial ADD INDEX subscription ( subscriptionid )
ALTER TABLE serial ADD FOREIGN KEY ( subscriptionid ) REFERENCES subscription (subscriptionid) ON DELETE CASCADE ;