diff --git a/hb_server/apps/sam/models.py b/hb_server/apps/sam/models.py
index 977621f..49bbfa5 100644
--- a/hb_server/apps/sam/models.py
+++ b/hb_server/apps/sam/models.py
@@ -1,4 +1,3 @@
-from numpy import product
 from apps.system.models import CommonAModel
 from django.db import models
 from django.contrib.auth.models import AbstractUser