fixed error on change request template

app/applicationlayer/cms/template/header/table_filters.py

 from django_filters import rest_framework as filters
 from django.db.models import Count
-from app.entities.models import ChangeRequestTemplateStakeHolders
+from app.entities.models import ChangeRequestTemplateHeader
 from django.db.models import Q
 
 
 class headerFilter(filters.FilterSet):
 
     class Meta:
-        model = ChangeRequestTemplateStakeHolders
+        model = ChangeRequestTemplateHeader
         fields = '__all__'

app/applicationlayer/cms/template/header/views.py

 from rest_framework.views import APIView
 from rest_framework import viewsets as meviewsets
-from app.applicationlayer.cms.template import serializers
 from app.entities import models
 
 from rest_framework.response import Response
@@ -31,6 +30,7 @@ from app.applicationlayer.cms.template.approver.serializers import ChangeRequest
 from app.applicationlayer.cms.template.stakeholder.serializers import ChangeRequestTemplateStakeHoldersSerializer
 from app.applicationlayer.cms.template.details.serializers import ChangeRequestTemplateDetailsSerializer
 from app.applicationlayer.cms.template.attachment.serializers import ChangeRequestTemplateAttachmentsSerializer
+from app.applicationlayer.cms.template.header.serializers import ChangeRequestTemplatesSerializer
 from app.applicationlayer.cms.template.header.table_filters import headerFilter
 
 
@@ -44,8 +44,8 @@ from app.applicationlayer.cms.template.details.table_filters import DetailsFilte
 
 class ChangeRequestTemplatesViewset(meviewsets.ModelViewSet):
 
-    queryset = models.ChangeRequestTemplateDetails.objects.all()
-    serializer_class = serializers.ChangeRequestTemplateDetailsSerializer
+    queryset = models.ChangeRequestTemplateHeader.objects.all()
+    serializer_class = ChangeRequestTemplatesSerializer
     pagination_class = CustomPagination
     lookup_field = 'template_no'
     filter_backends = (DjangoFilterBackend, SearchFilter, OrderingFilter)
@@ -61,8 +61,6 @@ class ChangeRequestTemplatesViewset(meviewsets.ModelViewSet):
 
     def list(self, request, *args, **kwargs):
         
-        self.queryset = self.queryset.order_by('-created')
-        self.queryset = QuerySetHelper.Sort(self)
         
         page = self.paginate_queryset(self.queryset)