I am getting an error message while trying to import AR_InvoiceHistoryDetail records into Sage 100 2021 from Sage 100 2018. Error #112 Keyed File Error (Record Key Size Invalid)

I am getting an error message while trying to import AR_InvoiceHistoryDetail records into Sage 100 2021 from Sage 100 2018. Error #112 Keyed File Error (Record Key Size Invalid), I got an error during month end close about an open invoice in the system because someone entered an invoice during the closing and then deleted it. Not sure if that has anything to do with it. Please advise what options I have, I have the backups from before the parallel installation, per the checklist for upgrading.