Error during Export and Line Pairing not happening if custom field added in AP project

Hello Experts,

If I'm processing invoice with total PO amount in single line it will do the automatically line pairing even PO is having multiple line item as PO line item Total and Invoice line item total is same without customization but I added some New Custom Field in AP invoice Project for Validate the Code combination value for NON-PO invoices and when we are processing the same invoice in that project it is getting failed and stopped in Verifier with the state 750.

check the H_logs and found the below logs, please advise how I can resolve the issue.