The type ‘SelectedSerialNumbersRow’ exists in both ‘Erp.Contracts.BO.CustShip, Version=10.2.100.0, Culture=neutral, PublicKeyToken=5d3fa3c7105d7992’ and ‘Erp.Contracts.BO.SelectedSerialNumbers, Version=10.2.100.0, Culture=neutral, PublicKeyToken=5d3fa3c7105d7992’
In some cases using a data directive can be a good workaround. Since it looks like you are on 10.2 you might want to inquire about SCR 155680 which addresses this issue and was targeted somewhere in 10.2.
Thanks you for quick reply @danbedwards, @josecgomez I will look into it as you suggested. I made possible in customization but issue with BPM so let me see your options as well.