Bugfix: fix KeyError when metadata raising an MetadataInvalidError. (#…

…134)

* Update metadata.py

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sdgx/data_models/metadata.py

@@ -405,9 +405,7 @@ def check(self):
 
         # for single primary key, it should has ID type
         if len(self.primary_keys) == 1 and list(self.primary_keys)[0] not in self.id_columns:
-            raise MetadataInvalidError(
-                f"Primary Key {self.primary_keys[0]} should has ID DataType."
-            )
+            raise MetadataInvalidError(f"Primary Key {self.primary_keys} should has ID DataType.")
 
         all_dtype_columns = self.get_all_data_type_columns()