Mapping certain columns from Excel to Smartsheet

Hello,

I am trying to map certain columns from Excel to Smartsheet. Currently, everything from Excel is being transferred over to Smartsheet so when I make an edit on Smarsheet, it's replaced by the Excel file every time I run it even though the column is not mapped. I only want to map the columns shown below that match the sheet column from the source field. I do not want to map the columns that say "Not mapped", those are the columns I will be filling out on Smartsheet. How can I make sure to delete the mapping of the rows I do not want information transferred from? Thanks!



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