Unable to Update Unit_Selling_Price on Credit Memo created using ar_invoice_api_pub

Hi,

We have a program that uses "ar_invoice_api_pub.create_single_invoice" to create credit memos.

Step1: We created credit memo using the API

Step2: We realized the amount is wrong, so made the credit memo as Incomplete from front-end

Step3: When we are trying to update the unit_selling_price on one of these lines from the front-end, it gives "FRM-40654: Record has been updated. Requery block to see change."

But, when we add a line to the same credit memo from front-end, we are able to update the price on that line. This issue happens only on the line created using the API. Earlier we did have issues with credit memos updated to Incomplete status using API, but this credit memo has been made Incomplete from front-end.