diff --git a/backend/open_webui/routers/chats.py b/backend/open_webui/routers/chats.py
index 90583328c9..8a8feb16fe 100644
--- a/backend/open_webui/routers/chats.py
+++ b/backend/open_webui/routers/chats.py
@@ -6,7 +6,12 @@ from uuid import uuid4
 from fastapi import APIRouter, BackgroundTasks, Depends, HTTPException, Request, Response, status
 from fastapi.responses import StreamingResponse
 from fastapi.security import HTTPAuthorizationCredentials
-from open_webui.config import ENABLE_ADMIN_CHAT_ACCESS, ENABLE_ADMIN_EXPORT
+from open_webui.config import (
+    CONTEXT_COMPACTION_RETENTION_PERCENTAGE,
+    CONTEXT_COMPACTION_TOKEN_THRESHOLD,
+    ENABLE_ADMIN_CHAT_ACCESS,
+    ENABLE_ADMIN_EXPORT,
+)
 from open_webui.constants import ERROR_MESSAGES
 from open_webui.events import EVENTS, publish_event
 from open_webui.internal.db import get_async_session
@@ -192,9 +197,9 @@ async def get_folder_unread_counts(user_id: str, db: AsyncSession | None = None)
 class ChatConfigForm(BaseModel):
     CONTEXT_COMPACTION_MODEL: str | None = ''
     ENABLE_CONTEXT_COMPACTION: bool
-    CONTEXT_COMPACTION_TOKEN_THRESHOLD: int
+    CONTEXT_COMPACTION_TOKEN_THRESHOLD: int | None = None
     CONTEXT_COMPACTION_TOKEN_CAP: int | None = None
-    CONTEXT_COMPACTION_RETENTION_PERCENTAGE: int = 40
+    CONTEXT_COMPACTION_RETENTION_PERCENTAGE: int | None = None
     CONTEXT_COMPACTION_PROMPT_TEMPLATE: str
     ENABLE_TOOL_PERMISSIONS: bool = False
 
@@ -874,9 +879,15 @@ async def get_chat_config(user=Depends(get_admin_user)):
 
 @router.post('/config', response_model=ChatConfigForm)
 async def set_chat_config(form_data: ChatConfigForm, user=Depends(get_admin_user)):
-    threshold = max(1, int(form_data.CONTEXT_COMPACTION_TOKEN_THRESHOLD))
+    threshold = form_data.CONTEXT_COMPACTION_TOKEN_THRESHOLD
+    if threshold is None:
+        threshold = CONTEXT_COMPACTION_TOKEN_THRESHOLD
+    threshold = max(1, int(threshold))
     token_cap = max(1, int(form_data.CONTEXT_COMPACTION_TOKEN_CAP or threshold))
-    retention_percentage = min(50, max(10, int(form_data.CONTEXT_COMPACTION_RETENTION_PERCENTAGE)))
+    retention_percentage = form_data.CONTEXT_COMPACTION_RETENTION_PERCENTAGE
+    if retention_percentage is None:
+        retention_percentage = CONTEXT_COMPACTION_RETENTION_PERCENTAGE
+    retention_percentage = min(50, max(10, int(retention_percentage)))
     await Config.upsert(
         chat_config_updates(
             {
diff --git a/backend/open_webui/routers/tasks.py b/backend/open_webui/routers/tasks.py
index 1dd53d8ebe..c2505b0ee0 100644
--- a/backend/open_webui/routers/tasks.py
+++ b/backend/open_webui/routers/tasks.py
@@ -5,6 +5,7 @@ from typing import Optional
 from fastapi import APIRouter, Depends, HTTPException, Request, Response, status
 from fastapi.responses import JSONResponse, RedirectResponse
 from open_webui.config import (
+    AUTOCOMPLETE_GENERATION_INPUT_MAX_LENGTH,
     DEFAULT_AUTOCOMPLETE_GENERATION_PROMPT_TEMPLATE,
     DEFAULT_EMOJI_GENERATION_PROMPT_TEMPLATE,
     DEFAULT_FOLLOW_UP_GENERATION_PROMPT_TEMPLATE,
@@ -118,7 +119,7 @@ class TaskConfigForm(BaseModel):
     TITLE_GENERATION_PROMPT_TEMPLATE: str
     IMAGE_PROMPT_GENERATION_PROMPT_TEMPLATE: str
     ENABLE_AUTOCOMPLETE_GENERATION: bool
-    AUTOCOMPLETE_GENERATION_INPUT_MAX_LENGTH: int
+    AUTOCOMPLETE_GENERATION_INPUT_MAX_LENGTH: int | None = None
     AUTOCOMPLETE_GENERATION_PROMPT_TEMPLATE: str
     TAGS_GENERATION_PROMPT_TEMPLATE: str
     FOLLOW_UP_GENERATION_PROMPT_TEMPLATE: str
@@ -134,7 +135,10 @@ class TaskConfigForm(BaseModel):
 
 @router.post('/config/update')
 async def update_task_config(request: Request, form_data: TaskConfigForm, user=Depends(get_admin_user)):
-    await Config.upsert(config_updates(form_data.model_dump(), TASK_CONFIG_KEYS))
+    data = form_data.model_dump()
+    if data['AUTOCOMPLETE_GENERATION_INPUT_MAX_LENGTH'] is None:
+        data['AUTOCOMPLETE_GENERATION_INPUT_MAX_LENGTH'] = AUTOCOMPLETE_GENERATION_INPUT_MAX_LENGTH
+    await Config.upsert(config_updates(data, TASK_CONFIG_KEYS))
     return await get_config_values(TASK_CONFIG_KEYS)
 
 
diff --git a/src/lib/components/admin/Settings/Interface.svelte b/src/lib/components/admin/Settings/Interface.svelte
index cd68640c6e..99daa73e5e 100644
--- a/src/lib/components/admin/Settings/Interface.svelte
+++ b/src/lib/components/admin/Settings/Interface.svelte
@@ -1,7 +1,7 @@
 <script lang="ts">
 	import { getModels, getTaskConfig, updateTaskConfig } from '$lib/apis';
 	import { getChatConfig, updateChatConfig } from '$lib/apis/chats';
-	import { createEventDispatcher, onMount, getContext } from 'svelte';
+	import { onMount, getContext } from 'svelte';
 	import { toast } from 'svelte-sonner';
 
 	import { getBaseModels } from '$lib/apis/models';
@@ -17,7 +17,7 @@
 	import AdminSettingSection from './AdminSettingSection.svelte';
 	import { config as appConfig } from '$lib/stores';
 
-	const dispatch = createEventDispatcher();
+	export let saveHandler: () => void;
 
 	const i18n: any = getContext('i18n');
 
@@ -67,10 +67,17 @@
 			TASK_MODEL_PARAMS: configuredParams(taskConfig.TASK_MODEL_PARAMS)
 		};
 
-		[taskConfig, chatConfig] = await Promise.all([
-			updateTaskConfig(localStorage.token, taskConfigPayload),
-			updateChatConfig(localStorage.token, chatConfig)
-		]);
+		try {
+			[taskConfig, chatConfig] = await Promise.all([
+				updateTaskConfig(localStorage.token, taskConfigPayload),
+				updateChatConfig(localStorage.token, chatConfig)
+			]);
+		} catch (error) {
+			toast.error(
+				Array.isArray(error) ? error.map((entry) => entry.msg).join('\n') : String(error)
+			);
+			return;
+		}
 		appConfig.update((current) =>
 			current
 				? {
@@ -83,6 +90,7 @@
 					}
 				: current
 		);
+		saveHandler();
 	};
 
 	let workspaceModels: any[] = [];
@@ -165,7 +173,6 @@
 		class="flex h-full flex-col justify-between text-sm"
 		on:submit|preventDefault={() => {
 			updateInterfaceHandler();
-			dispatch('save');
 		}}
 	>
 		<h2 class="text-sm font-medium text-gray-900 dark:text-white mb-4">
diff --git a/src/lib/components/chat/SettingsModal.svelte b/src/lib/components/chat/SettingsModal.svelte
index 35d60fa941..c20f170cd1 100644
--- a/src/lib/components/chat/SettingsModal.svelte
+++ b/src/lib/components/chat/SettingsModal.svelte
@@ -879,7 +879,7 @@
 				<AdminCodeExecution saveHandler={adminConfigSaveHandler} />
 			{:else if selectedTab === 'admin:interface'}
 				<AdminInterface
-					on:save={() => {
+					saveHandler={() => {
 						toast.success($i18n.t('Settings saved successfully!'));
 					}}
 				/>