diff --git a/src/api/ai/chat/conversation/index.ts b/src/api/ai/chat/conversation/index.ts
index 14be6c77f..15a0db322 100644
--- a/src/api/ai/chat/conversation/index.ts
+++ b/src/api/ai/chat/conversation/index.ts
@@ -12,7 +12,7 @@ export interface ChatConversationVO {
   temperature: number // 温度参数
   maxTokens: number // 单条回复的最大 Token 数量
   maxContexts: number // 上下文的最大 Message 数量
-  createTime?: Date // 创建时间
+  createTime: Date // 创建时间
   // 额外字段
   systemMessage?: string // 角色设定
   modelName?: string // 模型名字
diff --git a/src/views/ai/chat/index/components/conversation/ConversationList.vue b/src/views/ai/chat/index/components/conversation/ConversationList.vue
index 6fa1478a9..f0ab09880 100644
--- a/src/views/ai/chat/index/components/conversation/ConversationList.vue
+++ b/src/views/ai/chat/index/components/conversation/ConversationList.vue
@@ -205,7 +205,7 @@ const getChatConversationList = async () => {
     conversationList.value = await ChatConversationApi.getChatConversationMyList()
     // 1.2 排序
     conversationList.value.sort((a, b) => {
-      return Number(b.createTime || 0) - Number(a.createTime || 0)
+      return Number(b.createTime) - Number(a.createTime)
     })
     // 1.3 没有任何对话情况
     if (conversationList.value.length === 0) {
@@ -252,7 +252,7 @@ const getConversationGroupByCreateTime = async (list: ChatConversationVO[]) => {
       continue
     }
     // 计算时间差（单位：毫秒）
-    const diff = now - Number(conversation.createTime || 0)
+    const diff = now - Number(conversation.createTime)
     // 根据时间间隔判断
     if (diff < oneDay) {
       groupMap['今天'].push(conversation)