diff --git a/工具v2/database_tools.py b/工具v2/database_tools.py
index f1e3a366..7628d69a 100644
--- a/工具v2/database_tools.py
+++ b/工具v2/database_tools.py
@@ -676,6 +676,7 @@ def AppendUsageData2024(prodict,field_id_and_content):
                         break
                 if importflag:
                     for u in oldusages:
+                        oldusage = parseUsage(u)
                         if usage["classid"] == oldusage["classid"]:
                             print(f"!!!!!!班级 {usage['classid']} 在题号为 {id} 的题目处已有使用记录, 在pending list中记录")
                             oldinfo = [v for v in prodict[id][field] if usage['classid'] in v]