diff --git a/src/backend/base/langflow/schema/dataframe.py b/src/backend/base/langflow/schema/dataframe.py
index 193036dc2..4d7373690 100644
--- a/src/backend/base/langflow/schema/dataframe.py
+++ b/src/backend/base/langflow/schema/dataframe.py
@@ -72,6 +72,9 @@ class DataFrame(pandas_DataFrame):
 
     @text_key.setter
     def text_key(self, value: str) -> None:
+        if value not in self.columns:
+            msg = f"Text key '{value}' not found in DataFrame columns"
+            raise ValueError(msg)
         self._text_key = value
 
     @property