diff --git a/backend/open_webui/routers/chats.py b/backend/open_webui/routers/chats.py
index 4b5e6c237b..f4632e5e19 100644
--- a/backend/open_webui/routers/chats.py
+++ b/backend/open_webui/routers/chats.py
@@ -1309,9 +1309,15 @@ async def update_chat_by_id(
                 form_data.chat.get('history'),
             )
 
-        chat = await Chats.update_chat_by_id(id, updated_chat, db=db)
+        touch = 'history' in form_data.chat or 'messages' in form_data.chat
+        chat = await Chats.update_chat_by_id(id, updated_chat, db=db, touch=touch)
         if form_data.variables is not None:
-            chat = await Chats.update_chat_variables_by_id(id, form_data.variables, db=db) or chat
+            chat = await Chats.update_chat_variables_by_id(
+                id,
+                form_data.variables,
+                db=db,
+                touch=False,
+            ) or chat
 
         # Reconcile chat_message rows without inferring deletes from missing IDs.
         # Message deletion has its own endpoint below.
diff --git a/src/lib/components/chat/Placeholder/ChatList.svelte b/src/lib/components/chat/Placeholder/ChatList.svelte
index 11ec415b2c..7bb702b54a 100644
--- a/src/lib/components/chat/Placeholder/ChatList.svelte
+++ b/src/lib/components/chat/Placeholder/ChatList.svelte
@@ -235,7 +235,7 @@
 
 				<div class="hidden sm:flex sm:basis-2/5 items-center justify-end gap-2">
 					<div class=" text-gray-500 dark:text-gray-400 text-xs">
-						{dayjs(((chat.updated_at ?? chat.created_at) ?? 0) * 1000).calendar()}
+						{dayjs((chat.updated_at ?? chat.created_at ?? 0) * 1000).calendar()}
 					</div>
 
 					{#if showOwnerInfo && chat.user_id && chat.owner_name}