If a tournament is downgraded from or upgraded to a Major, this market will endeavor to change resolutions accordingly 

 the upgrade/downgrade occurs before the February 2026.

If an option should resolve YES but nobody points it out in the comments of this market, that option is liable to resolve NO at any time before February 2026. In that specific scenario traders forfeit the right to demand that particular resolution be corrected, though I may correct the resolution at my own personal discretion.