diff --git a/superset/db_engine_specs/presto.py b/superset/db_engine_specs/presto.py
index 645dd32d26..bd7424b0de 100644
--- a/superset/db_engine_specs/presto.py
+++ b/superset/db_engine_specs/presto.py
@@ -1198,7 +1198,7 @@ class PrestoEngineSpec(BaseEngineSpec):  # pylint: disable=too-many-public-metho
         part_fields = indexes[0]["column_names"]
         for k in kwargs.keys():  # pylint: disable=consider-iterating-dictionary
             if k not in k in part_fields:  # pylint: disable=comparison-with-itself
-                msg = "Field [{k}] is not part of the portioning key"
+                msg = f"Field [{k}] is not part of the portioning key"
                 raise SupersetTemplateException(msg)
         if len(kwargs.keys()) != len(part_fields) - 1:
             msg = (