diff --git a/apps/server/src/sync/sync.module.ts b/apps/server/src/sync/sync.module.ts
index d7b8ff7..5cba3e8 100644
--- a/apps/server/src/sync/sync.module.ts
+++ b/apps/server/src/sync/sync.module.ts
@@ -14,7 +14,6 @@ import {
   Student,
   Role,
   Class,
-  ClassStudent,
 } from '../entities';
 import { SyncService } from './sync.service';
 import { SyncController } from './sync.controller';
@@ -34,7 +33,6 @@ import { ScheduleSyncService } from './schedule-sync.service';
       Student,
       Role,
       Class,
-      ClassStudent,
     ]),
     IntegrationModule,
     AttendanceModule,
diff --git a/apps/server/src/sync/sync.service.ts b/apps/server/src/sync/sync.service.ts
index 8089dda..2a7469c 100644
--- a/apps/server/src/sync/sync.service.ts
+++ b/apps/server/src/sync/sync.service.ts
@@ -40,8 +40,6 @@ export class SyncService {
     private readonly roleRepo: Repository<Role>,
     @InjectRepository(ClassEntity)
     private readonly classRepo: Repository<ClassEntity>,
-    @InjectRepository(ClassStudent)
-    private readonly classStudentRepo: Repository<ClassStudent>,
     private readonly dingTalkService: DingTalkService,
     private readonly weComService: WeComService,
     private readonly attendanceImportService: AttendanceImportService,
@@ -255,7 +253,7 @@ export class SyncService {
         const tc = await manager.count(ClassTeacher, { where: { classId } });
         const sc = await manager.count(ClassStudent, { where: { classId } });
         if (tc === 0 && sc === 0) {
-          const cls = await this.classRepo.findOne({ where: { id: classId } });
+          const cls = await manager.findOne(ClassEntity, { where: { id: classId } });
           warnings.push(`班级 "${cls?.name}" (deptId=${deptId}) 无任何师生`);
         }
       }