diff --git a/CHANGELOG.md b/CHANGELOG.md
index a9e435a6af..cbda1f194a 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -60,6 +60,7 @@
 - Fix: `hashtags/trend`にてRedisからトレンドの情報が取得できない際にInternal Server Errorになる問題を修正
 - Fix: HTLをリロードまたは遡行したとき、フォローしているチャンネルのノートが含まれない問題を修正 #11765 #12181
 - Fix: リノートをリノートできるのを修正
+- Fix: アクセストークンを削除すると、通知が取得できなくなる場合がある問題を修正
 
 ## 2023.10.2
 
diff --git a/packages/backend/src/core/entities/NotificationEntityService.ts b/packages/backend/src/core/entities/NotificationEntityService.ts
index 3ee7c91f3a..9542815bd7 100644
--- a/packages/backend/src/core/entities/NotificationEntityService.ts
+++ b/packages/backend/src/core/entities/NotificationEntityService.ts
@@ -7,7 +7,7 @@ import { Inject, Injectable } from '@nestjs/common';
 import { ModuleRef } from '@nestjs/core';
 import { In } from 'typeorm';
 import { DI } from '@/di-symbols.js';
-import type { AccessTokensRepository, FollowRequestsRepository, NotesRepository, MiUser, UsersRepository } from '@/models/_.js';
+import type { FollowRequestsRepository, NotesRepository, MiUser, UsersRepository } from '@/models/_.js';
 import { awaitAll } from '@/misc/prelude/await-all.js';
 import type { MiNotification } from '@/models/Notification.js';
 import type { MiNote } from '@/models/Note.js';
@@ -40,9 +40,6 @@ export class NotificationEntityService implements OnModuleInit {
 		@Inject(DI.followRequestsRepository)
 		private followRequestsRepository: FollowRequestsRepository,
 
-		@Inject(DI.accessTokensRepository)
-		private accessTokensRepository: AccessTokensRepository,
-
 		//private userEntityService: UserEntityService,
 		//private noteEntityService: NoteEntityService,
 		//private customEmojiService: CustomEmojiService,
@@ -69,7 +66,6 @@ export class NotificationEntityService implements OnModuleInit {
 		},
 	): Promise<Packed<'Notification'>> {
 		const notification = src;
-		const token = notification.appAccessTokenId ? await this.accessTokensRepository.findOneByOrFail({ id: notification.appAccessTokenId }) : null;
 		const noteIfNeed = NOTE_REQUIRED_NOTIFICATION_TYPES.has(notification.type) && notification.noteId != null ? (
 			hint?.packedNotes != null
 				? hint.packedNotes.get(notification.noteId)
@@ -100,8 +96,8 @@ export class NotificationEntityService implements OnModuleInit {
 			} : {}),
 			...(notification.type === 'app' ? {
 				body: notification.customBody,
-				header: notification.customHeader ?? token?.name,
-				icon: notification.customIcon ?? token?.iconUrl,
+				header: notification.customHeader,
+				icon: notification.customIcon,
 			} : {}),
 		});
 	}
diff --git a/packages/backend/src/server/api/endpoints/notifications/create.ts b/packages/backend/src/server/api/endpoints/notifications/create.ts
index 268628cf76..19bc6fa8d7 100644
--- a/packages/backend/src/server/api/endpoints/notifications/create.ts
+++ b/packages/backend/src/server/api/endpoints/notifications/create.ts
@@ -42,8 +42,8 @@ export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-
 			this.notificationService.createNotification(user.id, 'app', {
 				appAccessTokenId: token ? token.id : null,
 				customBody: ps.body,
-				customHeader: ps.header,
-				customIcon: ps.icon,
+				customHeader: ps.header ?? token?.name,
+				customIcon: ps.icon ?? token?.iconUrl,
 			});
 		});
 	}