How do i stop getting my mods from being downloaded from the repo in the repo?ngame when i start up

Duplicate mods means that you manually downloaded a mod you were also subscribed.
Since the repository uses a separate folder (beamng.drive/mods/repo), the game is detecting the mod being present twice.

Go to your mods folder, and delete the ZIP that correspond to the mod (do not delete the one inside the 'repo' folder).


In the future, just choice one method to get the mod, don't download the mod manually AND subscribe at the same time.

 

If you have the mod twice, you must have downloaded them from two separate sources.
Anyhow, the warning message should tell you the location of both files.
Go there, and delete one of the two (again, if one is inside the 'repo' folder, it means it was downloaded through the repository and you should not delete that manually, rather delete the one outside the 'repo' folder)