diff --git a/agenta-cli/agenta/sdk/types.py b/agenta-cli/agenta/sdk/types.py
index 497cbdec39..a133d785f7 100644
--- a/agenta-cli/agenta/sdk/types.py
+++ b/agenta-cli/agenta/sdk/types.py
@@ -131,8 +131,7 @@ class GroupedMultipleChoiceParam(str):
     def __new__(cls, default: str = None, choices: Dict[str, List[str]] = None):
         if choices is None:
             choices = {}
-
-        if default and not any(default in choices for choices in choices.values()):
+        if default and not any(default in choice_list for choice_list in choices.values()):
             if not choices:
                 print(
                     f"Warning: Default value {default} provided but choices are empty."