Incorrect POS tag for `hers`?

[AngledLuffa]

In the following sentence, I believe the XPOS on hers should be PRP$:

# sent_id = answers-20111108093211AA8bYFE_ans-0002
49      my      my      PRON    PRP$    Case=Gen|Number=Sing|Person=1|Poss=Yes|PronType=Prs     50      nmod:poss       50:nmod:poss    _
50      room    room    NOUN    NN      Number=Sing     54      nsubj   54:nsubj        _
51      is      be      AUX     VBZ     Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin   54      cop     54:cop  _
52      right   right   ADV     RB      _       54      advmod  54:advmod       _
53      next    next    ADJ     JJ      Degree=Pos      54      amod    54:amod _
54      door    door    NOUN    NN      Number=Sing     37      conj    37:conj:and     _
55      to      to      ADP     IN      _       56      case    56:case _
56      hers    her     PRON    PRP     Gender=Fem|Number=Sing|Person=3|Poss=Yes|PronType=Prs   54      nmod    54:nmod:to      _

[nschneid]

PRP is correct I think. See bottom row of the table at https://universaldependencies.org/en/pos/PRON.html

[AngledLuffa]

Huh, that's really weird to me. I always thought of PRP$ as possessive pronoun, not a subcategory of those.