Fix settings import

src/pretix/base/models/items.py

@@ -9,6 +9,7 @@ import dateutil.parser
 import pytz
 from django.core.exceptions import ValidationError
 from django.core.validators import RegexValidator
+from django.conf import settings
 from django.db import models
 from django.db.models import Q
 from django.utils import formats
@@ -26,7 +27,6 @@ from pretix.base.models.base import LoggedModel
 from pretix.base.models.fields import MultiStringField
 from pretix.base.models.tax import TaxedPrice
 
-from ... import settings
 from .event import Event, SubEvent