diff --git a/src/composables/useArrayData.js b/src/composables/useArrayData.js
index 89d4dee5c..3268939de 100644
--- a/src/composables/useArrayData.js
+++ b/src/composables/useArrayData.js
@@ -202,6 +202,7 @@ export function useArrayData(key, userOptions) {
     }
 
     function toArray(str = []) {
+        if (!str) return [];
         if (Array.isArray(str)) return str;
         if (typeof str === 'string') return str.split(',').map((item) => item.trim());
     }