nit

lm_eval/api/group.py

@@ -49,7 +49,11 @@ class GroupConfig(dict):
                 AggMetricConfig(**item) if isinstance(item, dict) else item
                 for item in self.aggregate_metric_list
             ]
-        self.version = self.version or self.metadata.get("version", "1.0")
+        self.version = (
+            self.version or self.metadata.get("version", "1.0")
+            if self.metadata
+            else "1.0"
+        )
 
     def to_dict(self, keep_callable: bool = False) -> dict:
         """dumps the current config as a dictionary object, as a printable format.