diff --git a/nomenclature/processor/region.py b/nomenclature/processor/region.py
index e2b7fa57..28f72720 100644
--- a/nomenclature/processor/region.py
+++ b/nomenclature/processor/region.py
@@ -735,10 +735,7 @@ def _aggregate_region(df, var, *regions, **kwargs):
     except ValueError as error:
         if str(error).startswith("Missing weights for the following data"):
             logger.info(
-                (
-                    f"Could not aggregate '{var}' for region '{regions[0]}' "
-                    f"({kwargs})\n{error}"
-                )
+                f"Could not aggregate '{var}' for region '{regions[0]}' ({kwargs})"
             )
         else:
             raise error