diff --git a/module/data/Item/attribute.mjs b/module/data/Item/attribute.mjs
index 3b2f7b0..e7769e9 100644
--- a/module/data/Item/attribute.mjs
+++ b/module/data/Item/attribute.mjs
@@ -16,8 +16,7 @@ export class AttributeItemData extends foundry.abstract.TypeDataModel {
 			key: new fields.StringField({
 				blank: false,
 				trim: true,
-				nullable: true,
-				initial: null,
+				nullable: false,
 			}),
 			aboveTheFold: new fields.BooleanField({
 				initial: false,