设置地区表国际区号字段默认值为0

Model/models.py

@@ -2142,7 +2142,7 @@ class CountryModel(models.Model):
     region = models.ForeignKey(RegionModel, to_field='id', on_delete=models.DO_NOTHING, verbose_name='关联区域表')
     country_code = models.CharField(max_length=2, default='', verbose_name='国家iso2代码')
     country_name = models.CharField(max_length=20, default='', verbose_name='国家名')
-    international_area_code = models.IntegerField(unique=0, verbose_name='国际区号')
+    international_area_code = models.IntegerField(default=0, verbose_name='国际区号')
 
     class Meta:
         db_table = 'tb_country'