Accounting Entry for customer Currency Error

Dears, I have the below error whenever I’m trying to create a quotation for this customer in USD currency.

Note: I had a previous transaction with the same customer in GBP.

Hello @Abdelrahman_Aly,

Please read through this issue: MultiCurrency - Can't invoice customer · Issue #31193 · frappe/erpnext · GitHub

It will explain how to fix your problem. It will also point out side-effects of using that method of multi-currency accounting. It will also recommend another method of multi-currency accounting.