diff --git a/src/Umbraco.Web.UI.Client/src/packages/core/modal/common/property-settings/property-settings-modal.element.ts b/src/Umbraco.Web.UI.Client/src/packages/core/modal/common/property-settings/property-settings-modal.element.ts
index a6b27a95c4..832bd3cdc0 100644
--- a/src/Umbraco.Web.UI.Client/src/packages/core/modal/common/property-settings/property-settings-modal.element.ts
+++ b/src/Umbraco.Web.UI.Client/src/packages/core/modal/common/property-settings/property-settings-modal.element.ts
@@ -6,7 +6,7 @@ import { UMB_DOCUMENT_TYPE_WORKSPACE_CONTEXT } from '@umbraco-cms/backoffice/doc
 import { UmbTextStyles } from '@umbraco-cms/backoffice/style';
 import type { UUIBooleanInputEvent, UUIInputEvent, UUISelectEvent } from '@umbraco-cms/backoffice/external/uui';
 import type { PropertyValueMap } from '@umbraco-cms/backoffice/external/lit';
-import { css, html, nothing, customElement, state } from '@umbraco-cms/backoffice/external/lit';
+import { css, html, nothing, customElement, state, ifDefined } from '@umbraco-cms/backoffice/external/lit';
 import type { UmbPropertySettingsModalValue, UmbPropertySettingsModalData } from '@umbraco-cms/backoffice/modal';
 import { UmbModalBaseElement } from '@umbraco-cms/backoffice/modal';
 import { generateAlias } from '@umbraco-cms/backoffice/utils';
@@ -260,7 +260,7 @@ export class UmbPropertySettingsModalElement extends UmbModalBaseElement<
 										.value=${this.value.description}></uui-textarea>
 								</div>
 								<umb-data-type-flow-input
-									.value=${this.value.dataType?.unique}
+									.value=${ifDefined(this.value.dataType?.unique)}
 									@change=${this.#onDataTypeIdChange}></umb-data-type-flow-input>
 								<hr />
 								<div class="container">
diff --git a/src/Umbraco.Web.UI.Client/src/packages/data-type/components/data-type-flow-input/data-type-flow-input.element.ts b/src/Umbraco.Web.UI.Client/src/packages/data-type/components/data-type-flow-input/data-type-flow-input.element.ts
index e8bd5cb161..dd2e5889e4 100644
--- a/src/Umbraco.Web.UI.Client/src/packages/data-type/components/data-type-flow-input/data-type-flow-input.element.ts
+++ b/src/Umbraco.Web.UI.Client/src/packages/data-type/components/data-type-flow-input/data-type-flow-input.element.ts
@@ -27,9 +27,6 @@ export class UmbInputDataTypeElement extends FormControlMixin(UmbLitElement) {
 	 * @default []
 	 */
 	@property({ type: String, attribute: false })
-	get value(): string {
-		return super.value?.toString() ?? '';
-	}
 	set value(dataTypeId: string) {
 		super.value = dataTypeId ?? '';
 		this._ids = super.value
@@ -37,6 +34,9 @@ export class UmbInputDataTypeElement extends FormControlMixin(UmbLitElement) {
 			.map((tag) => tag.trim())
 			.filter((id) => id.length !== 0);
 	}
+	get value(): string {
+		return super.value?.toString() ?? '';
+	}
 
 	#editDataTypeModal?: UmbModalRouteRegistrationController;