ALTER TABLE visitor_applications
    ADD COLUMN IF NOT EXISTS control_name VARCHAR(80),
    ADD COLUMN IF NOT EXISTS control_team VARCHAR(80),
    ADD COLUMN IF NOT EXISTS control_contact VARCHAR(60),
    ADD COLUMN IF NOT EXISTS watcher1_name VARCHAR(80),
    ADD COLUMN IF NOT EXISTS watcher1_team VARCHAR(80),
    ADD COLUMN IF NOT EXISTS watcher1_contact VARCHAR(60);