When a File is Optimized, the next thing to do is save it.
However the save operation is cumbersome and since the file in question being optimized is already a combination of other files and additional duplication not needed, the original file name and location is the desired saved to. Yet, Adobe ask for a new location and new file name for some strange reason. And while it is possible to select the original location and file to over write, that process is cumbersome.
Replacing the original seems like the default choice.