1) Invoice created & posted for customer

2) Banks statement posted in a specific bank account having the payment of above invoice 

3) Reconcile payment with invoice 

4) Odoo automatically post journal entries for the exchange rate difference (date of invoice creation and date of payment receipts) .

5) Journal entry debit / credit account receivable , which increase or decrease customer balance

*** I need to stop generation and automatic posting of this  journal entry.