In a config recommendation rule, how can I recognize that this is a reconfig?

Summary:

I need to know whether I'm doing a new config or reconfig in a recommendation rule.

I'd also like to know which parent doc number is being reconfig'd.

Content (required):

There are some commerce line attributes that I would like to pull from the quote upon reconfig. But there could be multiple configurations in the Quote.

I want to only pull the commerce line attributes from the lines that are being reconfig'd.

Version (include the version you are using, if applicable):

23B

Code Snippet (add any code snippets that support your topic, if applicable):