Insert field data on each row of uploaded and parsed content

Hi,

On the upload and parse content below, I want to insert data into each row that I need on the parsed input to the other form so the data can be grouped by this field, but it can't be on the uploaded .csv.

How can I do this?

fileContent = input.Cruise_Sales_Upload.content;
rowlis = fileContent.toList("\n");
i = 0;
for each rl in rowlis
{
if(i > 0 && i < rowlis.size() - 1)
{
lis = rl.toList();
ppstfNewRecordID = insert into Preferred_Partner_Sales_Totals_Form
[
Added_User=zoho.loginuser
Supplier_Sub_Type=lis.get(0)
Company_Name=lis.get(1)
Cruise_Sales_2023=if(lis.get(2).tostring() == "",0,lis.get(2).todecimal())
Cruise_Sales_2022=if(lis.get(3).tostring() == "",0,lis.get(3).todecimal())
];
//fetch ppstf recird
ppstfRecord = Preferred_Partner_Sales_Totals_Form[ID = ppstfNewRecordID];
//
if(ppstfRecord.Company_Sub_Type = "Cruise Line" && ppstfRecord.Cruise_Sales_2023 = null && ppstfRecord.Cruise_Sales_2022 = null && ppstfRecord.Cruise_Sales_2020 = null && ppstfRecord.Cruise_Sales_2021 = null)
{
//
delete from Preferred_Partner_Sales_Totals_Form[ID = ppstfNewRecordID];
}
}
i = i + 1;
info rowlis;
}