The problem of using action NAT address group in ENSP firewall

jy404360704

Why can‘t action NAT address group & nbsp; & nbsp; addressgroup1 be used in NAT policy as in the experiment
[FW1-policy-nat-rule-policy_ nat_ 1]action ?
  destination-nat  Indicate that the rule action is destination NAT
  no-nat           Indicate that the rule action is NO-NAT
  source-nat       Indicate that the rule action is source NAT