Error while trying to import invoices which line type as 'CHARGE'

Hello,

We are trying to import an invoice having line type as "CHARGES". On importing the line items into AR interface tables, we get an error when we ruin Auto invoice -

AR_RAXTRX-1617 - Only debit memos and credit memos may have a line type of 'CHARGES'

Any help or pointers on how to work around this would be very helpful.