修改数据库字段，设置物联网卡不为唯一

apps/IOTCard/models.py

@@ -17,7 +17,7 @@ class PlatSimInfo(models.Model):
         (1, "四情平台"),
         (2, "大数据平台")
     ]
-    simId = models.CharField(u'物联网卡号', max_length=20, unique=True)
+    simId = models.CharField(u'物联网卡号', max_length=20)
     sim_operators = models.IntegerField(u"物联网卡供应商", choices=OPERATORS_CHOICE, default=1)
     input_type = models.IntegerField(u"录入类型", choices=TYPE_CHOICE, default=1)
     deviceId = models.CharField(u'设备号', max_length=32)