setting field value in custom record

Hi

I am trying to write a script that sets a field value in a custom record.  The field is a list/record but has a validation of
Opportunity Status   equal   Current Record
                                                        Current User
                                                        In Negotiation

Which causes the drop down box to display the tranid and the username under the selection area.

If I set the field to the record number it gives me an Invalid key reference however if I go into debug and display the value of the field nlapiGetFieldValue('custrecord_policy_num') it shows a record number.

If the field does not have the validations, the code works correctly.  How can I bypass the validation when setting this field?