#96 is the first cameo app of the Sentinels Mark III.
#98 is the first full app of the Sentinels Mark III.
This is already in Core. Recently made changes to the way the sentinel keys are written. Sentinels are not really living beings, they’re A.I. That’s why the fall in to the key category of “Debut of item/vehicle/location”. In this category (just like new costume) there are no 1st cameo & 1st full. Just the panel they appear in is their “Debut”. When I did this, I also added other Sentinel MK’s and variations. We are going to leave it as is. Thank you for posting!