The answer seems fairly simple under modal realism (roughly, the thesis that all logically possible worlds exist in the same sense as mathematical facts exist, and thus that the term “actual” in “our actual world” is just an indexical).
If the simulation accurately follows a possible world, and contains a unit of (dis)utility, it doesn’t generate that unit of (dis)utility, it just “discovers” it; it proves that for a given world-state an event happens which your utility function assigns a particular value. Repeating the simulation again is also only rediscovering the same fact, not in any sense creating copies of it.
The answer seems fairly simple under modal realism (roughly, the thesis that all logically possible worlds exist in the same sense as mathematical facts exist, and thus that the term “actual” in “our actual world” is just an indexical).
If the simulation accurately follows a possible world, and contains a unit of (dis)utility, it doesn’t generate that unit of (dis)utility, it just “discovers” it; it proves that for a given world-state an event happens which your utility function assigns a particular value. Repeating the simulation again is also only rediscovering the same fact, not in any sense creating copies of it.