Drop "ON DELETE CASCADE" on page_template, since this might lead to crippled entries in the database.When someone delets via operations in the database a form, protentially existingform pages refering to this item might be left in a crippled state.The cascade operation deletes the revision (xowiki_page_instance), but leavesthe half-crippled item. The problem does not exist over the web interface,since it does not allow such items to be deleted while form pages exist.
Show less
