diff --git a/projects/plugins/jetpack/extensions/blocks/simple-payments/index.js b/projects/plugins/jetpack/extensions/blocks/simple-payments/index.js
index e1589a5eee138..1e08af86341ce 100644
--- a/projects/plugins/jetpack/extensions/blocks/simple-payments/index.js
+++ b/projects/plugins/jetpack/extensions/blocks/simple-payments/index.js
@@ -131,6 +131,7 @@ export const settings = {
 		},
 		productId: {
 			type: 'number',
+			unique: true,
 		},
 		title: {
 			type: 'string',