Bungie are aware of the issue. The two things they recommend trying are seeing if you can untrack it via Journey screen and then via third party apps like DIM. If that doesn't work then a while ago Bungie introduced a change to forcibly untrack things like this at the launch of each new season/episode. This system however isn't guaranteed to work and has ran into issues before, so as long as it works this may resolve your problem. [quote]Starting with Season 18, Seasonal Challenges and your currently tracked Triumph, weapon catalyst, pattern, medal, etc. will be untracked at each Seasonal reset to help avoid similar issues.[/quote] https://www.bungie.net/7/en/News/article/51707