bulk copy data from 1 model to another in django

I am having 2 model of similar schema and I want to bulk copy from model1 to model2  but model2 is having 3 more fields but I want to store null in these fields. 

class SubscriberBalanceProcess(models.Model):

    

    

    VOICE_SOC = models.CharField(max_length=50, null=True)

    SMS_SOC = models.CharField(max_length=50, null=True)

    DATA_SOC = models.CharField(max_length=50, null=True)

    DATE_TIME = models.DateTimeField(auto_now_add=True, blank=True)

    TOTAL_REMAIN_VOICE = models.BigIntegerField(default=0, null=True, blank=True)

    TOTAL_REMAIN_SMS = models.BigIntegerField(default=0, null=True, blank=True)

    TOTAL_REMAIN_DATA = models.BigIntegerField(max_length=100, null=True, blank=True)

    class Meta:

        db_table = "SUBSCRIBER_BALANCE_PROCESS_TEST"

class SubscriberBalance(models.Model):

    

    

    VOICE_SOC = models.CharField(max_length=50, null=True)

    SMS_SOC = models.CharField(max_length=50, null=True)

    DATA_SOC = models.CharField(max_length=50, null=True)

    DATE_TIME = models.DateTimeField(auto_now_add=True, blank=True)

    FILE_ID = models.CharField(max_length=255, null=True)

    class Meta:

        db_table = 'subscriber_balance'

SubscriberBalanceProcess.objects.bulk_create(SubscriberBalance.objects.filter(VOICE_STATUS='N', SMS_FLAG=1, TENANT_ID__in=loginIdList))

Traceback (most recent call last):

  File "manage.py", line 10, in <module>

    execute_from_command_line(sys.argv)

  File "C:\Python27\lib\site-packages\django\core\management\__init__.py", line 353, in execute_from_command_line

    utility.execute()

  File "C:\Python27\lib\site-packages\django\core\management\__init__.py", line 345, in execute

    self.fetch_command(subcommand).run_from_argv(self.argv)

  File "C:\Python27\lib\site-packages\django\core\management\base.py", line 348, in run_from_argv

    self.execute(*args, **cmd_options)

  File "C:\Python27\lib\site-packages\django\core\management\base.py", line 399, in execute

    output = self.handle(*args, **options)

  File "C:\Users\Development\Desktop\python\crons\management\commands\sendsms_voicebalance_process_rule_tarif.py", line 74, in handle

    self.sendsmsVoicebalance()

  File "C:\Users\Development\Desktop\python\crons\management\commands\sendsms_voicebalance_process_rule_tarif.py", line 30, in sendsms

Voicebalance

    activeMVNO = Functions.updateNonRuleMatchRecordByTarif(categoryId, type)

  File "C:\Users\Development\Desktop\python\crons\includes\functions.py", line 49, in updateNonRuleMatchRecordByTarif

    Functions.truncateUpdateVoice(loginIdList)

  File "C:\Users\Development\Desktop\python\crons\includes\functions.py", line 64, in truncateUpdateVoice

    SubscriberBalanceProcess.objects.bulk_create(SubscriberBalance.objects.filter(VOICE_STATUS='N', SMS_FLAG=1, TENANT_ID__in=loginIdL

ist))

  File "C:\Python27\lib\site-packages\django\db\models\manager.py", line 122, in manager_method

    return getattr(self.get_queryset(), name)(*args, **kwargs)

  File "C:\Python27\lib\site-packages\django\db\models\query.py", line 447, in bulk_create

    self._batched_insert(objs_with_pk, fields, batch_size)

  File "C:\Python27\lib\site-packages\django\db\models\query.py", line 1056, in _batched_insert

    using=self.db)

  File "C:\Python27\lib\site-packages\django\db\models\manager.py", line 122, in manager_method

    return getattr(self.get_queryset(), name)(*args, **kwargs)

  File "C:\Python27\lib\site-packages\django\db\models\query.py", line 1039, in _insert

    return query.get_compiler(using=using).execute_sql(return_id)

  File "C:\Python27\lib\site-packages\django\db\models\sql\compiler.py", line 1059, in execute_sql

    for sql, params in self.as_sql():

  File "C:\Python27\lib\site-packages\django\db\models\sql\compiler.py", line 1019, in as_sql

    for obj in self.query.objs

  File "C:\Python27\lib\site-packages\django\db\models\sql\compiler.py", line 968, in pre_save_val

    return field.pre_save(obj, add=True)

  File "C:\Python27\lib\site-packages\django\db\models\fields\__init__.py", line 702, in pre_save

    return getattr(model_instance, self.attname)

AttributeError: 'SubscriberBalance' object has no attribute 'TOTAL_REMAIN_VOICE'

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