diff --git a/homeassistant/data_entry_flow.py b/homeassistant/data_entry_flow.py
index a7b63d090f3..1636bf2beaa 100644
--- a/homeassistant/data_entry_flow.py
+++ b/homeassistant/data_entry_flow.py
@@ -918,8 +918,8 @@ class section:
     CONFIG_SCHEMA = vol.Schema(
         {
             vol.Optional("collapsed", default=False): bool,
-            vol.Inclusive("multiple", "multiple"): bool,
-            vol.Inclusive("default", "multiple"): list[Any],
+            vol.Optional("multiple", default=False): bool,
+            vol.Optional("default", default=[]): list[Any],
         },
     )
 
diff --git a/homeassistant/helpers/config_validation.py b/homeassistant/helpers/config_validation.py
index a7e109df55c..365024a537e 100644
--- a/homeassistant/helpers/config_validation.py
+++ b/homeassistant/helpers/config_validation.py
@@ -1145,8 +1145,8 @@ def _custom_serializer(schema: Any, *, allow_section: bool) -> Any:
                 ),
             ),
             "expanded": not schema.options["collapsed"],
-            "multiple": schema.options.get("multiple"),
-            "default": schema.options.get("default"),
+            "multiple": schema.options["multiple"],
+            "default": schema.options["default"],
         }
 
     if isinstance(schema, multi_select):