diff --git a/app/src/main/java/kr/co/vividnext/sodalive/chat/talk/room/ChatRoomActivity.kt b/app/src/main/java/kr/co/vividnext/sodalive/chat/talk/room/ChatRoomActivity.kt
index 19a725c6..8ed0ef70 100644
--- a/app/src/main/java/kr/co/vividnext/sodalive/chat/talk/room/ChatRoomActivity.kt
+++ b/app/src/main/java/kr/co/vividnext/sodalive/chat/talk/room/ChatRoomActivity.kt
@@ -423,7 +423,7 @@ class ChatRoomActivity : BaseActivity<ActivityChatRoomBinding>(
 
                 // 페이지 상태 갱신
                 hasMoreMessages = response.hasMoreMessages
-                nextCursor = sorted.firstOrNull()?.createdAt
+                nextCursor = sorted.firstOrNull()?.messageId
 
                 // 최신 메시지 위치로
                 scrollToBottom()
@@ -491,15 +491,15 @@ class ChatRoomActivity : BaseActivity<ActivityChatRoomBinding>(
         isLoading = true
 
         val token = "Bearer ${SharedPreferenceManager.token}"
-        // 커서: API에서 내려준 nextCursor 우선, 없으면 현재 목록 중 가장 오래된 createdAt
-        val fallbackOldestCreatedAt: Long? = items.firstOrNull()?.let {
+        // 커서: API에서 내려준 nextCursor 우선, 없으면 현재 목록 중 가장 오래된 messageId
+        val fallbackOldestMessageId: Long? = items.firstOrNull()?.let {
             when (it) {
-                is ChatListItem.UserMessage -> it.data.createdAt
-                is ChatListItem.AiMessage -> it.data.createdAt
+                is ChatListItem.UserMessage -> it.data.messageId
+                is ChatListItem.AiMessage -> it.data.messageId
                 else -> null
             }
         }
-        val cursor: Long? = nextCursor ?: fallbackOldestCreatedAt
+        val cursor: Long? = nextCursor ?: fallbackOldestMessageId
 
         val disposable =
             chatRepository.loadMoreMessages(token = token, roomId = roomId, cursor = cursor)
@@ -532,8 +532,8 @@ class ChatRoomActivity : BaseActivity<ActivityChatRoomBinding>(
                     hasMoreMessages = response.hasMore
                     nextCursor = response.nextCursor ?: newChatItems.firstOrNull()?.let {
                         when (it) {
-                            is ChatListItem.UserMessage -> it.data.createdAt
-                            is ChatListItem.AiMessage -> it.data.createdAt
+                            is ChatListItem.UserMessage -> it.data.messageId
+                            is ChatListItem.AiMessage -> it.data.messageId
                             else -> null
                         }
                     }