That's because you are going to a forest, Cursed class items don't get destroyed in the dungeons where they get equipped, and enemies ignore them when equipping.(They're not gonna block their own equipping.)
Viewing post in Ero Dungeons [Old Version] comments
Oh... that makes sense... sort of wish the durability mechanic still applied to the armor when you went into a new dungeon because it just meant that her accessory buffs were being denied due to their low durability, (which can't be restored by the morale system, only outfits can,) and the "force equip" mechanic was completely absent which broke tension and just made it annoying.