升级1.21后会在price/prices.bean文件里面记录同一天的多笔汇率记录，系统报错，在记账的时候无法删除汇率记录

[sanq88]

month/2024-12.bean:116: No position matches "Posting(account='Assets:Flow:Cash:现金', units=-20.00 MYR, cost=CostSpec(number_per=Decimal('1.645'), number_total=None, currency='CNY', date=None, label=None, merge=False), price=None, flag=None, meta={'filename': 'month/2024-12.bean', 'lineno': 117})" against balance (143.75 MYR, 300.00 CNY)

2024-12-18 * "小贩" "买水果，夜市"
Assets:Flow:Cash:现金 -20.00 MYR {1.645 CNY}
Expenses:Life:Food:Fruit:水果 20.00 MYR {1.645 CNY}

month/2024-12.bean:120: Not enough lots to reduce "-200.00 MYR {1.645 CNY}": 34.00 MYR {1.645 CNY, 2024-12-10}

2024-12-18 * "XX" "XX费"
Assets:Flow:Bank:BOC -200.00 MYR {1.645 CNY}
Expenses:Learning:Study 200.00 MYR {1.645 CNY}