update accounting model

billard/migrations/0021_accounting_account_user.py

@@ -1,16 +1,13 @@
 # -*- coding: utf-8 -*-
-# Generated by Django 1.11 on 2017-04-26 10:14
+# Generated by Django 1.11 on 2017-04-26 10:17
 from __future__ import unicode_literals
 
-from django.conf import settings
 from django.db import migrations, models
-import django.db.models.deletion
 
 
 class Migration(migrations.Migration):
 
     dependencies = [
-        migrations.swappable_dependency(settings.AUTH_USER_MODEL),
         ('billard', '0020_auto_20170410_1853'),
     ]
 
@@ -18,6 +15,6 @@ class Migration(migrations.Migration):
         migrations.AddField(
             model_name='accounting',
             name='account_user',
-            field=models.OneToOneField(blank=True, null=True, on_delete=django.db.models.deletion.CASCADE, related_name='accountings', to=settings.AUTH_USER_MODEL, verbose_name='Abr. Benutzer'),
+            field=models.CharField(blank=True, max_length=128, null=True, verbose_name='Abr. Benutzer'),
         ),
     ]