diff --git a/apps/enm/views.py b/apps/enm/views.py
index 9f45b06d..71fd3e4b 100644
--- a/apps/enm/views.py
+++ b/apps/enm/views.py
@@ -217,7 +217,8 @@ class MpointStatViewSet(BulkCreateModelMixin, BulkDestroyModelMixin, CustomListM
         qs = self.filter_queryset(self.get_queryset())
         group_by = request.query_params.get("group_by", "")
         group_by_list = group_by.split(",")
-        group_by_list.remove("")
+        if "" in group_by_list:
+            group_by_list.remove("")
         if 'mpoint' not in group_by_list:
             group_by_list.append('mpoint')
         qs = qs.values()
diff --git a/apps/wpm/services.py b/apps/wpm/services.py
index 37f1951a..d4a01587 100644
--- a/apps/wpm/services.py
+++ b/apps/wpm/services.py
@@ -131,7 +131,7 @@ def get_pcoal_heat(year_s: int, month_s: int, day_s: int):
                 else:
                     qs.pcoal_heat = 6000
                 qs.save(update_fields=['pcoal_heat'])
-            cache.set(key, qs.pcoal_heat, timeout=60 * 60 * 48)
+            cache.set(key, qs.pcoal_heat, timeout=60 * 60 * 8)
             return qs.pcoal_heat
         except Exception as e:
             myLogger.error(f'获取煤粉热值失败，{e}', exc_info=True)