Nope, that means you don't have her on Max Hearts yet and depends on which Route you have chosen her to be, you will see her change to a different outfit once you have her on Max Hearts
I believe it is not available yet in this update unfortunately. I've done multiple playthroughs trying to find hidden dialogues which unlocks that outfit and so far Anna only change to her current Slut Outfit ( Bra & Waist Apron ).
