diff --git a/genshin/models/zzz/chronicle/stats.py b/genshin/models/zzz/chronicle/stats.py
index 24ac9715..14de839f 100644
--- a/genshin/models/zzz/chronicle/stats.py
+++ b/genshin/models/zzz/chronicle/stats.py
@@ -33,11 +33,13 @@ class ZZZStats(APIModel):
     shiyu_defense_frontiers: int = Aliased("cur_period_zone_layer_count")
     bangboo_obtained: int = Aliased("buddy_num")
     achievement_count: int
-    hia_coin: HIACoin = Aliased("commemorative_coins_list")
+    hia_coin: typing.Optional[HIACoin] = Aliased("commemorative_coins_list")
 
     @pydantic.field_validator("hia_coin", mode="before")
-    def __unnest_hia_coin(cls, v: typing.List[typing.Dict[str, typing.Any]]) -> typing.Dict[str, typing.Any]:
-        return v[0]
+    def __unnest_hia_coin(
+        cls, v: typing.List[typing.Dict[str, typing.Any]]
+    ) -> typing.Optional[typing.Dict[str, typing.Any]]:
+        return v[0] if v else None
 
 
 class ZZZBaseBangboo(APIModel):