Updating Custom Record causes FIELD_PARAM_REQD error

Hi,
I'm updating an existing CustomRecord where the object I'm providing within the code contains the following fields:
- RecType, by providing its id
- The internal id of the custom record
- Boolean custom field within the custom field list.

Unfortunately I'm getting FIELD_PARAM_REQD error response with the message: "Please enter a value for Name".
Tried to supply a name for the Rectype / CustomRecord (Although it makes no sense) but still getting the same result.

The code:

 public void updateIsProcessFieldOnPaymentFile(CustomRecord originalCustomRecord) throws NetsuiteException {                    // Copy original unchanged properties          CustomRecord updatedCustomRecord = new CustomRecord();          RecordRef recordRef = new RecordRef();          recordRef.setInternalId(originalCustomRecord.getRecType().getInternalId());          updatedCustomRecord.setRecType(recordRef);          updatedCustomRecord.setInternalId(originalCustomRecord.getInternalId());            // Update the field          ArrayList<CustomFieldRef> customFields = new ArrayList<CustomFieldRef>();          BooleanCustomFieldRef booleanCustomFieldRef = new BooleanCustomFieldRef();          booleanCustomFieldRef.setValue(true);          booleanCustomFieldRef.setScriptId("custrecord_imperva_file_is_processed");          customFields.add(booleanCustomFieldRef);            // Add field to record          CustomFieldList customFieldList = new CustomFieldList();          customFieldList.setCustomField(customFields.toArray(new CustomFieldRef[customFields.size()]));          updatedCustomRecord.setCustomFieldList(customFieldList);                    // Update netsuite          WriteResponse writeResponse = null;          try {              writeResponse = updateRecord(updatedCustomRecord);          } catch (Exception e) {              LOG.error("Couldn't update NetSuite Payment File with id: " + updatedCustomRecord.getInternalId());              throw new NetsuiteException("Couldn't update NetSuite Payment File with id: " + updatedCustomRecord.getInternalId());          }            if (!writeResponse.getStatus().isIsSuccess()) {              StatusDetail[]