Core/Auras: Prevent infinite stacking of passive auras with the same id from the same caster on the same target

Closes #18475

(cherry picked from commit 88676120586df7581677eca8d5e2724579c69482)

src/server/game/Spells/Auras/SpellAuras.cpp

@@ -1583,7 +1583,7 @@ bool Aura::CanStackWith(Aura const* existingAura) const
     bool sameCaster = GetCasterGUID() == existingAura->GetCasterGUID();
 
     // passive auras don't stack with another rank of the spell cast by same caster
-    if (IsPassive() && sameCaster && m_spellInfo->IsDifferentRankOf(existingSpellInfo))
+    if (IsPassive() && sameCaster && m_spellInfo->IsRankOf(existingSpellInfo))
         return false;
 
     for (uint8 i = 0; i < MAX_SPELL_EFFECTS; ++i)