diff --git a/care/facility/api/serializers/asset.py b/care/facility/api/serializers/asset.py
index 430e2028c8..2ccdd8fa85 100644
--- a/care/facility/api/serializers/asset.py
+++ b/care/facility/api/serializers/asset.py
@@ -2,6 +2,7 @@
 
 from django.core.cache import cache
 from django.db import transaction
+from django.db.models import Q
 from django.shortcuts import get_object_or_404
 from django.utils.timezone import now
 from rest_framework import serializers
@@ -100,22 +101,23 @@ class Meta:
             "duty_staff",
         )
 
-    def validate(self, attrs):
-        duty_staff = attrs.get("duty_staff", [])
-        if not duty_staff:
+    def validate_duty_staff(self, value):
+        if not value:
             raise ValidationError({"duty_staff": "Duty staff cannot be empty"})
 
-        duty_staff_ids = [user.id for user in duty_staff]
+        duty_staff_ids = [user.id for user in value]
         facility_id = self.instance.facility.id
 
-        users = User.objects.filter(id__in=duty_staff_ids)
-        for user in users:
-            if user.home_facility.id != facility_id:
-                raise ValidationError(
-                    {"duty_staff": "Only Home Facility Doctors and Staffs are allowed"}
-                )
+        count = User.objects.filter(
+            Q(home_facility__id=facility_id) & Q(id__in=duty_staff_ids)
+        ).count()
 
-        return super().validate(attrs)
+        if count != len(duty_staff_ids):
+            raise ValidationError(
+                {"duty_staff": "Only Home Facility Doctors and Staffs are allowed"}
+            )
+
+        return value
 
 
 class AssetBareMinimumSerializer(ModelSerializer):