diff --git a/pywxdump/api/api.py b/pywxdump/api/api.py
index 04122db..39ad07f 100644
--- a/pywxdump/api/api.py
+++ b/pywxdump/api/api.py
@@ -76,7 +76,7 @@ def init_key():
         return ReJson(1002, body=f"my_wxid is required: {my_wxid}")
 
     old_merge_save_path = read_session(g.sf, my_wxid, "merge_path")
-    if os.path.exists(old_merge_save_path):
+    if isinstance(old_merge_save_path, str) and os.path.exists(old_merge_save_path):
         pmsg = ParsingMSG(old_merge_save_path)
         pmsg.close_all_connection()