Smart log while merging duplicated entries or better ways of citing two bibtex files?

[sebastianst (Sebastian S.)]

I think we are looking for the same solution:

Save key mapping when merging or detecting duplicates

When merging one bibliography into another, or detecting duplicates, it would be very useful to somehow save/export a mapping from the old entries’ keys to the target entry’s key. E.g. my main bib file contains an entry @article{authorFooBar2019,...} and the bib file I am merging into the main file contains @article{author_foo_bar_baz_2019,...} Jabref correctly detects the duplicate and I decide to merge them together into the main file’s entry, keeping the key authorFooBar2019. So far so g…

How did you eventually solve the issue