diff --git a/plugins/sphinx/tool_cron.py b/plugins/sphinx/tool_cron.py
index cba869c64..ffcb02fe5 100644
--- a/plugins/sphinx/tool_cron.py
+++ b/plugins/sphinx/tool_cron.py
@@ -64,9 +64,12 @@ def getConfigDeltaData():
 
 
 def createBgTask():
-    # removeBgTask()
+    removeBgTask()
+    removeDeltaBgTask()
+
     createBgTaskByName(getPluginName())
     createBgTaskDeltaByName(getPluginName())
+    return True
 
 
 def createBgTaskByName(name):