diff --git a/pandas/core/arrays/categorical.py b/pandas/core/arrays/categorical.py
index 70699c45e0c36..0a93ebf82c869 100644
--- a/pandas/core/arrays/categorical.py
+++ b/pandas/core/arrays/categorical.py
@@ -1474,10 +1474,11 @@ def _validate_scalar(self, fill_value):
         elif fill_value in self.categories:
             fill_value = self._unbox_scalar(fill_value)
         else:
-            raise TypeError(
-                "Cannot setitem on a Categorical with a new "
-                f"category ({fill_value}), set the categories first"
-            )
+            raise TypeError( 
+            "Cannot setitem on a Categorical with a new " 
+            f"category ({fill_value}), set the categories first" 
+            ) from None
+
         return fill_value
 
     # -------------------------------------------------------------