diff --git a/utils/list_merge.py b/utils/list_merge.py
index 375efcc35..c167ca300 100644
--- a/utils/list_merge.py
+++ b/utils/list_merge.py
@@ -239,6 +239,10 @@ class sub_merge():
 
         content_list = list(
             filter(lambda x: x != '', ''.join(content_list).split("\n")))
+        # dup remove by string content
+        print("it was " + str(content_list.__len__()))
+        content_list = list(set(content_list))
+        print("now is " + str(content_list.__len__()))
         content_raw = "\n".join(content_list)
 
         # content_yaml = sub_convert.main(content_raw, 'content', 'content', {