Hi @Sadek96 ,
Welcome to the Community!
I didn’t use that FUB so far but in the Integrated safety technology User’s manual 6.4.0 there is exactly your case: Subsequently loading a Safe Commissioning Table(page 2602) .
They don’t use ST for the implementation but the example explains step by step want you need to do; it’s possible something is missing in your prj.
Ciao
Valerio