diff --git a/wwwroot/api/fetch_forex_rates.dspy b/wwwroot/api/fetch_forex_rates.dspy
index 65587b9..bebeb9a 100644
--- a/wwwroot/api/fetch_forex_rates.dspy
+++ b/wwwroot/api/fetch_forex_rates.dspy
@@ -48,9 +48,9 @@ async with get_sor_context(request._run_ns, 'accounting') as sor:
         record_id = f'er_{code.lower()}_cny_{today.replace("-","")}'
 
         await sor.execute(
-            """INSERT INTO exchange_rate (id, from_currency, to_currency, buy_rate, sell_rate, mid_rate, effective_date, updated_at)
-               VALUES (${id}$, ${from_cur}$, 'CNY', ${buy}$, ${sell}$, ${mid}$, ${date}$, NOW())
-               ON DUPLICATE KEY UPDATE buy_rate=${buy}$, sell_rate=${sell}$, mid_rate=${mid}$, updated_at=NOW()""",
+            """INSERT INTO exchange_rate (id, from_currency, to_currency, buy_rate, sell_rate, mid_rate, effective_date)
+               VALUES (${id}$, ${from_cur}$, 'CNY', ${buy}$, ${sell}$, ${mid}$, ${date}$)
+               ON DUPLICATE KEY UPDATE buy_rate=${buy}$, sell_rate=${sell}$, mid_rate=${mid}$""",
             {'id': record_id, 'from_cur': code, 'buy': buy_rate, 'sell': sell_rate, 'mid': mid_rate, 'date': today}
         )
         inserted += 1