Sounds like you want to update the Part MoM after one was already made then?
AFAIK that might be possible with the Job Entry but I have never heard of that being done. What you are saying is true you’ve created a base part configuration and saved it with the part smart string I’m guessing. You cannot do a reconfigure like this AFAIK even programmatically.
In our case, we have base parts for example: C-ABC-12 that have their configurations imparted to them every time dynamically, C-ABC-12 will generally slightly different options & mom sometimes so saying it cannot be done is untrue. Each update to the SO/Quote or Job if being made to stock will fully reconfigure the product. As these items have a base GVWR and configuration there are multiple options allowing for different colors/option upgrades etc, but because the base frame is the same the base part does not change only the options/parts list which is created via the keep when rules for the configurator. There are many different frames/mfgs/models to choose in the top half which will update the options dataset in the bottom half of the configurator for each configurable model from on base configurable part.
And you should not be able to using it they way you are.