diff --git a/luxonis_ml/data/datasets/annotation.py b/luxonis_ml/data/datasets/annotation.py
index a4dacdd7..2f85b2ed 100644
--- a/luxonis_ml/data/datasets/annotation.py
+++ b/luxonis_ml/data/datasets/annotation.py
@@ -376,7 +376,7 @@ def validate_mask(cls, values: Dict[str, Any]) -> Dict[str, Any]:
                     )
             except Exception as e:
                 raise ValueError(
-                    f"Failed to load mask from {mask_path}. {str(e)}"
+                    f"Failed to load mask from {mask_path}"
                 ) from e
         if not isinstance(mask, np.ndarray):
             raise ValueError(