With Bloomburrow only being 60 days and Duskmourn only being 48 days, and both costing as much as a 90-day mastery pass, you need to allow players to re-load older Mastery passes that they pay for. This is a no-brainer. Halo infinite does it and it'll incentivize players to buy more mastery passes if they know they won't lose out on content they spent money to get.