AP Invoice Validation Error for PO-Matched Invoice:The combination ID 300,000,007,290,838 is not val

Summary:

Hello,

I am encountering an issue while validating an AP invoice that is matched to a Purchase Order.

During the validation process, the invoice fails with the following error:

The combination ID 300,000,007,290,838 is not valid.

To troubleshoot the issue, I created a manual AP invoice without PO matching, and it was validated successfully.

Additionally, I verified the corresponding charge account in Manage Account Combinations, and the account combination is active.

I also noticed that when I try to open the Invoice Line Distribution for the PO-matched invoice, no distribution lines are displayed, as shown in the attached screenshot.

Could you please investigate this issue and advise on the root cause?