Add Save Model in DeviceA24

Sistemas/admin.py

@@ -1,19 +1,18 @@
 from django.contrib import admin
 from .models import Sistema, sistemas_por_cliente, Device,DeviceHistory, BitacoraErrores
-# Register your models here.
-
 
 class BitacoraErroresAdmin(admin.ModelAdmin):
-    list_display = ['level', 'message']
+    list_display = ['level', 'message','timestamp']
+
 class Sistema_Admin(admin.ModelAdmin):
-    def NSistema(self,obj):        
+    def NSistema(self,obj):
         return obj.nombre_sistema
     list_display = ['NSistema']
 
 class SPC(admin.ModelAdmin):
     '''Sistemas Por Cliente'''
     def Cliente(self,obj):
-        return obj    
+        return obj
     list_display = ['id_sistema','Cliente','num_licencias']
 
 class DeviceHistoryAdmin(admin.ModelAdmin):