I'm working on a jointly developed project with a friend. We both make changes to our own copy of the same esp and we are editing/making spells, quests,scripts and references, not landmasses or cells.
Since we are working on different things I thought the cleanest way to go about merging the two files would be to overwrite my esp into his. Yet when I save his as a master and open mine in order to overwrite the esm, there's hundreds of duplicates....
What would be the best way to merge these two esp, without creating duplicates.? Alternatively, how can I delete all the duplicates at once without having to go at it one by one.


Thank you.