'This Sales Order Line Is Not Yet Fulfilled' Error

Hi ,
We are not able to process transactions to install base as install base API csi_order_fulfill_pub.order_fulfillment checks for validation as below:

    IF  (l_order_line_rec.item_type_code = 'OPTION' AND l_order_line_rec.ato_line_id is not null)
       OR
        (l_order_line_rec.source_type_code = 'EXTERNAL') -- Bug 4168922
    THEN
      l_order_line_rec.fulfilled_quantity := l_order_line_rec.shipped_quantity;
    ELSE
      IF l_order_line_rec.fulfilled_quantity <= 0 THEN
        fnd_message.set_name('CSI', 'CSI_ORDER_LINE_NOT_FULFILLED');
        fnd_message.set_token('FULFILLED_QUANTITY', l_order_line_rec.fulfilled_quantity);