Update admin_routes.py

admin_routes.py

@@ -958,6 +958,9 @@ async def validate_regex(
             "pattern": pattern,
             "test_value": test_value
         }
+    except DuplicateResourceError as e:
+        # Let the exception handler deal with it
+        raise
     except Exception as e:
         return {
             "valid": False,