diff --git a/src/Umbraco.Web.UI.Client/src/packages/core/repository/repository-items.manager.ts b/src/Umbraco.Web.UI.Client/src/packages/core/repository/repository-items.manager.ts
index c8b2e5b8bd..3992d118ef 100644
--- a/src/Umbraco.Web.UI.Client/src/packages/core/repository/repository-items.manager.ts
+++ b/src/Umbraco.Web.UI.Client/src/packages/core/repository/repository-items.manager.ts
@@ -76,8 +76,8 @@ export class UmbRepositoryItemsManager<ItemType extends { unique: string }> exte
 		return this.#uniques.getValue();
 	}
 
-	setUniques(uniques: string[]): void {
-		this.#uniques.setValue(uniques);
+	setUniques(uniques: string[] | undefined): void {
+		this.#uniques.setValue(uniques ?? []);
 	}
 
 	getItems(): Array<ItemType> {
diff --git a/src/Umbraco.Web.UI.Client/src/packages/core/sorter/sorter.controller.ts b/src/Umbraco.Web.UI.Client/src/packages/core/sorter/sorter.controller.ts
index b90c7c1614..ef285d0b90 100644
--- a/src/Umbraco.Web.UI.Client/src/packages/core/sorter/sorter.controller.ts
+++ b/src/Umbraco.Web.UI.Client/src/packages/core/sorter/sorter.controller.ts
@@ -221,7 +221,7 @@ export type UmbSorterConfig<T, ElementType extends HTMLElement = HTMLElement> =
 	Partial<Pick<INTERNAL_UmbSorterConfig<T, ElementType>, 'ignorerSelector' | 'containerSelector' | 'identifier'>>;
 
 /**
- 
+
  * @class UmbSorterController
  * @implements {UmbControllerInterface}
  * @description This controller can make user able to sort items.
@@ -346,10 +346,8 @@ export class UmbSorterController<T, ElementType extends HTMLElement = HTMLElemen
 		}
 	}
 
-	setModel(model: Array<T>): void {
-		if (this.#model) {
-			this.#model = model;
-		}
+	setModel(model: Array<T> | undefined): void {
+		this.#model = model ?? [];
 	}
 
 	/**