diff --git a/app.py b/app.py
index 75813fa..098ef8e 100644
--- a/app.py
+++ b/app.py
@@ -309,6 +309,12 @@ def vision_config():
 def make_backup(manual=False):
     """生成备份 zip（数据库 + 上传目录）"""
     with _lock:
+        # 先落盘备份状态（让备份文件内包含正确的时间/计数），再 checkpoint 合并 WAL
+        db = sqlite3.connect(str(DB_PATH))
+        set_setting(db, "last_backup_time", _ts())
+        set_setting(db, "change_counter", "0")
+        db.commit()
+        db.close()
         c = sqlite3.connect(str(DB_PATH))
         try:
             c.execute("PRAGMA wal_checkpoint(TRUNCATE)")
@@ -323,11 +329,6 @@ def make_backup(manual=False):
                 for p in sorted(UPLOAD_DIR.rglob("*")):
                     if p.is_file():
                         z.write(p, f"data/uploads/{p.relative_to(UPLOAD_DIR)}")
-        db = sqlite3.connect(str(DB_PATH))
-        set_setting(db, "last_backup_time", _ts())
-        set_setting(db, "change_counter", "0")
-        db.commit()
-        db.close()
         _prune_backups()
         return name