diff --git a/src/components/Tune/_Form/FormString.vue b/src/components/Tune/_Form/FormString.vue
index e4f892b0d549..838ef433084e 100644
--- a/src/components/Tune/_Form/FormString.vue
+++ b/src/components/Tune/_Form/FormString.vue
@@ -27,10 +27,12 @@ const itemsListbox = computed(() => {
       value: item
     }));
   } else if (props.definition?.anyOf) {
-    return props.definition.anyOf.map((item: any) => ({
-      value: item.const,
-      name: item.title
-    }));
+    return props.definition.anyOf
+      .filter(item => item.const && item.title)
+      .map((item: any) => ({
+        value: item.const,
+        name: item.title
+      }));
   }
   return [];
 });
@@ -38,7 +40,7 @@ const itemsListbox = computed(() => {
 
 <template>
   <TuneListbox
-    v-if="definition?.enum || definition?.anyOf"
+    v-if="(definition?.enum || definition?.anyOf) && itemsListbox.length"
     ref="textInputRef"
     :items="itemsListbox"
     :model-value="modelValue"