diff --git a/web/app/components/workflow/nodes/question-classifier/default.ts b/web/app/components/workflow/nodes/question-classifier/default.ts
index a059401e0e..4279d1d4b0 100644
--- a/web/app/components/workflow/nodes/question-classifier/default.ts
+++ b/web/app/components/workflow/nodes/question-classifier/default.ts
@@ -16,7 +16,16 @@ const nodeDefault: NodeDefault<QuestionClassifierNodeType> = {
         temperature: 0.7,
       },
     },
-    classes: [],
+    classes: [
+      {
+        id: '1',
+        name: '',
+      },
+      {
+        id: '2',
+        name: '',
+      },
+    ],
   },
   getAvailablePrevNodes(isChatMode: boolean) {
     const nodes = isChatMode
@@ -39,6 +48,8 @@ const nodeDefault: NodeDefault<QuestionClassifierNodeType> = {
     if (!errorMessages && (!payload.classes || payload.classes.length === 0))
       errorMessages = t(`${i18nPrefix}.errorMsg.fieldRequired`, { field: t(`${i18nPrefix}.nodes.questionClassifiers.class`) })
 
+    if (!errorMessages && (payload.classes.some(item => !item.name)))
+      errorMessages = t(`${i18nPrefix}.errorMsg.fieldRequired`, { field: t(`${i18nPrefix}.nodes.questionClassifiers.topicName`) })
     return {
       isValid: !errorMessages,
       errorMessage: errorMessages,
diff --git a/web/i18n/en-US/workflow.ts b/web/i18n/en-US/workflow.ts
index 3e2dc603c6..6f0fe3708f 100644
--- a/web/i18n/en-US/workflow.ts
+++ b/web/i18n/en-US/workflow.ts
@@ -313,6 +313,7 @@ const translation = {
       class: 'Class',
       classNamePlaceholder: 'Write your class name',
       advancedSetting: 'Advanced Setting',
+      topicName: 'Topic Name',
       topicPlaceholder: 'Write your topic name',
       addClass: 'Add Class',
       instruction: 'Instruction',
diff --git a/web/i18n/zh-Hans/workflow.ts b/web/i18n/zh-Hans/workflow.ts
index 860ca855e7..8fa02a5645 100644
--- a/web/i18n/zh-Hans/workflow.ts
+++ b/web/i18n/zh-Hans/workflow.ts
@@ -313,6 +313,7 @@ const translation = {
       class: '分类',
       classNamePlaceholder: '输入你的分类名称',
       advancedSetting: '高级设置',
+      topicName: '主题内容',
       topicPlaceholder: '在这里输入你的主题内容',
       addClass: '添加分类',
       instruction: '指令',