Your amenity filter can show duplicate or stale options even after you clean them up in your PMS.
Why this happens. The amenity filter panel is a curated list managed on the site itself. It is separate from the live amenity data synced from your PMS, so an amenity that no longer exists on any of your properties can still appear as a filter option.
What to do. The option stays in the filter until it is removed from the site’s filter list. Cleaning it up in your PMS alone does not remove it from the website filters.