Hi, I was comparing the PTF's applied on our system with PSP defective PTF report and found some PTF's to be defective. Though all these defective PTF's are in superseded status. Do I still need to consider applying the recommended PTF's by IBM for it? How do I delete these defective PTF's and reapply the one recommended by IBM? What is industry best practice and steps that needed to be followed to work with defective PTF's?