diff --git a/execution.py b/execution.py
index afcc07ce7..0f0de778c 100644
--- a/execution.py
+++ b/execution.py
@@ -755,6 +755,7 @@ async def validate_inputs(prompt_id, prompt, item, validated):
     errors = []
     valid = True
 
+    v3_data = None
     validate_function_inputs = []
     validate_has_kwargs = False
     if issubclass(obj_class, _ComfyNodeInternal):