Two Project Draft invoices are merging into single invoice

Hi,

When I call 'PRC: Generate draft invoices for range of projects' program from conversion package, some different invoice numbers are merging and creating into single invoice. So, we are getting invoice amount difference between source and target systems.

Example:

Before GDI program ran:

Project  Invoice_Number   Amount

687345   1885                      2000

687345    1886                     3000

After GDI program ran, results are as below

Project  Invoice_Number   Amount

687345   1885                      5000

Here , invoice number 1886 amount is merging into 1885 invoice number.

Please let me know how to find the root cause.