diff --git a/src/Umbraco.Web.UI.Client/src/packages/core/content-type/modals/property-type-settings/property-type-settings-modal.element.ts b/src/Umbraco.Web.UI.Client/src/packages/core/content-type/modals/property-type-settings/property-type-settings-modal.element.ts
index 8c045ef7a7..0b0149ec97 100644
--- a/src/Umbraco.Web.UI.Client/src/packages/core/content-type/modals/property-type-settings/property-type-settings-modal.element.ts
+++ b/src/Umbraco.Web.UI.Client/src/packages/core/content-type/modals/property-type-settings/property-type-settings-modal.element.ts
@@ -133,7 +133,6 @@ export class UmbPropertyTypeSettingsModalElement extends UmbModalBaseElement<
 
 	#onMandatoryChange(event: UUIBooleanInputEvent) {
 		const mandatory = event.target.checked;
-		this.value.validation!.mandatory = mandatory;
 		this.updateValue({
 			validation: { ...this.value.validation, mandatory },
 		});