Migrate Paid invoices

Migrate Paid invoices

Good day

I am trying to migrate my invoices from Wave to Zoho however I have the following issues:
1. I cannot seem to migrate paid invoices
2. I get an error message saying unit code is missing. 
When importing data using google sheets, I imported 'invoice data and payments' as I want to import paid invoices. I did not use the 'invoice data and line items' option as it will not give me the paid invoices. 



What can I do?