* Checklist.bonus_used as an absolute value

store/models.py

@@ -13,7 +13,7 @@ from django.core.files.base import ContentFile
 from django.core.validators import MinValueValidator, MaxValueValidator
 from django.db import models
 from django.db.models import F, Case, When, DecimalField, Prefetch, Max, Q, Subquery, OuterRef
-from django.db.models.functions import Ceil, Coalesce
+from django.db.models.functions import Ceil, Coalesce, Abs
 from django.db.models.lookups import GreaterThan
 from django.db.transaction import atomic
 from django.utils import timezone
@@ -215,7 +215,7 @@ class ChecklistQuerySet(models.QuerySet):
                     order_id=OuterRef('id'))
             .values('amount'))
 
-        return self.annotate(_bonus_used=Coalesce(amount_subquery, 0))
+        return self.annotate(_bonus_used=Coalesce(Abs(amount_subquery), 0))
 
     def default_ordering(self):
         return self.order_by(F('status_updated_at').desc(nulls_last=True))