fix: 500 on product create view

club/views.py

@@ -29,11 +29,7 @@ from django.contrib.auth.mixins import PermissionRequiredMixin
 from django.core.exceptions import NON_FIELD_ERRORS, PermissionDenied, ValidationError
 from django.core.paginator import InvalidPage, Paginator
 from django.db.models import Sum
-from django.http import (
-    Http404,
-    HttpResponseRedirect,
-    StreamingHttpResponse,
-)
+from django.http import Http404, HttpResponseRedirect, StreamingHttpResponse
 from django.shortcuts import get_object_or_404, redirect
 from django.urls import reverse, reverse_lazy
 from django.utils import timezone
@@ -58,10 +54,7 @@ from com.views import (
     PosterEditBaseView,
     PosterListBaseView,
 )
-from core.auth.mixins import (
-    CanEditMixin,
-    CanViewMixin,
-)
+from core.auth.mixins import CanEditMixin, CanViewMixin
 from core.models import PageRev
 from core.views import DetailFormView, PageEditViewBase
 from core.views.mixins import TabedViewMixin