There is more than one Sales Order with the same customer reference.
It may be hidden because Show Outstanding Only is set. There could be a historic Sales Order that has the same customer reference.
Trying to run a sales order import but it is rejecting the import lines with Multiple orders exist for this customer with this customer reference
There is more than one Sales Order with the same customer reference.
It may be hidden because Show Outstanding Only is set. There could be a historic Sales Order that has the same customer reference.