diff --git a/src/Nitride/Entities/CreateIndexEntitiesValidator.cs b/src/Nitride/Entities/CreateIndexEntitiesValidator.cs
index 5993004..0e790f9 100644
--- a/src/Nitride/Entities/CreateIndexEntitiesValidator.cs
+++ b/src/Nitride/Entities/CreateIndexEntitiesValidator.cs
@@ -10,6 +10,5 @@ public class CreateIndexEntitiesValidator<TIndexKey> : AbstractValidator<CreateI
         this.RuleFor(x => x.CreateIndexEntity).NotNull();
         this.RuleFor(x => x.GetIndexKeys).NotNull();
         this.RuleFor(x => x.UpdateIndexEntity).NotNull();
-        this.RuleFor(x => x.GetIndexEntityKey).NotNull();
     }
 }