diff --git a/apps/tickets/handler/apply_application.py b/apps/tickets/handler/apply_application.py
index 8d03a995d..4bdd58984 100644
--- a/apps/tickets/handler/apply_application.py
+++ b/apps/tickets/handler/apply_application.py
@@ -37,8 +37,8 @@ class Handler(BaseHandler):
     def _construct_meta_body_of_open(self):
         apply_category_display = self.ticket.meta.get('apply_category_display')
         apply_type_display = self.ticket.meta.get('apply_type_display')
-        apply_applications = self.ticket.meta.get('apply_applications', [])
-        apply_system_users = self.ticket.meta.get('apply_system_users', [])
+        apply_applications = self.ticket.meta.get('apply_applications_display', [])
+        apply_system_users = self.ticket.meta.get('apply_system_users_display', [])
         apply_date_start = self.ticket.meta.get('apply_date_start')
         apply_date_expired = self.ticket.meta.get('apply_date_expired')
         applied_body = '''{}: {},
diff --git a/apps/tickets/handler/apply_asset.py b/apps/tickets/handler/apply_asset.py
index ae8ded3b1..42daf6742 100644
--- a/apps/tickets/handler/apply_asset.py
+++ b/apps/tickets/handler/apply_asset.py
@@ -32,8 +32,8 @@ class Handler(BaseHandler):
 
     # body
     def _construct_meta_body_of_open(self):
-        apply_assets = self.ticket.meta.get('apply_assets', [])
-        apply_system_users = self.ticket.meta.get('apply_system_users', [])
+        apply_assets = self.ticket.meta.get('apply_assets_display', [])
+        apply_system_users = self.ticket.meta.get('apply_system_users_display', [])
         apply_actions_display = self.ticket.meta.get('apply_actions_display', [])
         apply_date_start = self.ticket.meta.get('apply_date_start')
         apply_date_expired = self.ticket.meta.get('apply_date_expired')
diff --git a/apps/tickets/serializers/ticket/ticket.py b/apps/tickets/serializers/ticket/ticket.py
index b5565008b..82ac70122 100644
--- a/apps/tickets/serializers/ticket/ticket.py
+++ b/apps/tickets/serializers/ticket/ticket.py
@@ -157,6 +157,12 @@ class TicketFlowApproveSerializer(serializers.ModelSerializer):
             return obj.assignees.values_list('id', flat=True)
         return []
 
+    def validate(self, attrs):
+        if attrs['strategy'] == TicketApprovalStrategy.custom_user and not attrs.get('assignees'):
+            error = _('Please select the Assignees')
+            raise serializers.ValidationError(error)
+        return super().validate(attrs)
+
 
 class TicketFlowSerializer(OrgResourceModelSerializerMixin):
     type_display = serializers.ReadOnlyField(source='get_type_display', label=_('Type display'))