New Slot Not Showing Up??

When Creating my Anim Montage I created a new slot in the default group so I can use it for the upper body of my Character. When going back to the Anim BP and creating a default slot blueprint under settings on the right hand side the UpperBody slot was supposed to show up, however the slot would not show up now matter what I did. Listed below are some screenshots of what is happening in case you don’t understand what i’m talking about since i’m a complete beginner. I am also using version 4.21.2