I have uploaded a map and now I thought it would be better to add some custom music, but I can't upload the newer version of the map file, because "This track already exists."

Is there a workaround?

I've had this problem before. In the end I had to delete the map and re-upload it. I'm not sure if there is another way to work around this problem, but that is just one way to do it.

You can probably update it with a dummy map and then your updated one. Will look into it sometime to see if it can be fixed though .

OK, thanks!

Could you include the check, that if the validation checksum of the map hasn't change you don't need to delete all replays?
That would be awesome...

With the MP4 update last year, we made it so that you can update the map file on the map page, and it retains all the replays, as long as the UID of the map doesn't change.

I just tested in-game by creating a Lagoon map with no custom music. Saved the map.
UID: FZZp82KAopLSIr5rcrZb78guyK2

Reopened the map in the editor, selected some custom music. Resaved the map to a new folder.
UID: FZZp82KAopLSIr5rcrZb78guyK2

So as long as the validation and map name remains the same, the UID should as well. And you should be able to update the map file without losing the replays on the track page.

Therefore I'm marking this one fixed.