unable to import a line item spreadsheet when doing an addendum or creating a new round.

Has anyone had any issue importing a line item template spreadsheet when creating a amendment or new round?   We have a sourcing event with a outcome of CCPA (Complex Contract Purchasing Agreement) in production which has previously had an addendum done previously without any issues.  Note:  Line items were not changed.

Now we are creating a second amendment which the line items are being replaced.  After deleting the line items from the lines tab and attempting to importing the txt (tab delimited) (*.txt) file we receive error message that "estimated quantity is not a recognized column name or it is in an invalid location."  (Attached).  Tried deleting the draft amendment started over same error message.  Tried this in our nonprod instance and got the same error message