diff --git a/composer/schema/grid/field.py b/composer/schema/grid/field.py
index 32b101e..2e596b6 100644
--- a/composer/schema/grid/field.py
+++ b/composer/schema/grid/field.py
@@ -241,6 +241,9 @@ class KeyTableFieldInstance(RecordsFieldInstance):
                                                   for name in self.dataNames]
         return result
 
+    def validate(self, value, data=None):
+        pass
+
 
 class ContextBasedKeyTableFieldInstance(KeyTableFieldInstance):