diff --git a/apps/wpm/services.py b/apps/wpm/services.py
index b06e4bd8..5b2ff402 100644
--- a/apps/wpm/services.py
+++ b/apps/wpm/services.py
@@ -566,6 +566,7 @@ def cal_material_count_from_mlog(mlog: Mlog):
             matid_list.append(matid[0])
         if matid[1]:
             matid_list.append(matid[1])
+    matid_list = list(set(matid_list))
     cal_material_count(matid_list)