Parameters in the static 1:1 NAT can be changed according to the following rules:
The deterministic pool must be in a no shutdown state when a prefix or a map command in deterministic NAT is added or removed.
All configured prefixes referencing the pool via the NAT policy must be deleted (un-configured) before the pool can be shut down.
Map statements can be modified only when prefix is shutdown state. All existing map statements must be removed before the new ones are created.