Just an FYI for everyone: each time you sign up for a competition in CS, you are also downloading information for a "mod". This shows up the same as "subscribing" to some content in the Workshop on Steam. When you are in the rF2 UI, and looking at Packages, you'll see them as MOD type in the listing, like "All Cars and Tracks". Sometimes these may show as readable names, and sometimes like "xxx_yyy_999" or similar; S397 don't seem to be consistent with naming them. On this packages screen there are 4 buttons, but the Uninstall button is never enabled, and you cannot in fact uninstall/unsubscribe from this screen (one of the more annoying lacking features in the UI in my opinion). Now, in the past, I had tried to use ModMgr to uninstall these competition mods and also the outdated content that they reference, specifically tracks. This didn't work: when rF2 starts up, it sees I've got subscribed content and decides it wants to download it. Confusingly, it does this for the mod but then complains there is "missing content" for the old track you also just deleted. So it keeps re-trying. Finally, I went into the Steam rF2 page, and then the Workshop page. In there for the workshop content listing, there is a filter for "subscribed content". This lists the aforementioned content for the competition mod. You can then unsubscribe from this entry, and now everything gets cleaned up. Pretty sure this will also trigger an uninstall of the old tracks/duplicates if not referenced by anything else; but maybe not.