Resolution for online refund

[olivercastro]

Summary of the issue
Unable to issue credit memo (online refund) for invoice. It would return the error
Refund amount must be less or equal to charged amount

Steps to reproduce

• Place an order with 2 distinct product items (with different prices)
• Create an invoice for each order items. (The first invoice should have a grand total greater than the second invoice)
• Create a credit memo for the first invoice

Expected Result

• Should be able to issue a credit memo for the first invoice.

Actual Result

• Unable to create a credit memo with message "Refund amount must be less or equal to charged amount"

Reason:
dibs_charge_id found in table sales_order_payment is getting updated with the latest generated transaction id upon creation of an invoice.