Please enter value(s) for: Subsidiary in Suitescript when creating Contact

I'm creating a contact record in Suitescript 2.0, and am setting the required fields, including the Subsidiary field, however I'm still receiving this error, and when I log the record before I save it, it shows the subsidiary being empty. I feel like I'm missing something simple in this code, but I just cant find it.

log.debug("Current Step", "Create new record");

var recordToCreate = record.create({
    type: record.Type.CONTACT,
    isDynamic: true,
});
recordToCreate.setValue({
    fieldId: "subsidiary",
    value: 1,
});
recordToCreate.setValue({
    fieldId: "firstname",
    value: newContact.FirstName,
});
recordToCreate.setValue({
    fieldId: "lastname",
    value: newContact.LastName,
});
recordToCreate.setValue({
    fieldId: "email",
    value: newContact.Email,
});
recordToCreate.setValue({
    fieldId: "company",
    value: existingCustomer.Id,
});


log.debug("Pre-save record", recordToCreate);


recordToCreate.save();


log.debug("Created record", recordToCreate);