diff --git a/frontends/src/jp/cmd_blog.py b/frontends/src/jp/cmd_blog.py
index 0c709cfd..4872b968 100644
--- a/frontends/src/jp/cmd_blog.py
+++ b/frontends/src/jp/cmd_blog.py
@@ -236,7 +236,7 @@ class Edit(base.CommandBase, BlogCommon):
         # and override metadata with command-line arguments
         mb_data['allow_comments'] = C.boolConst(not self.args.no_comment)
         if self.args.tag:
-            data_format.iter2dict('tag', self.args.tag, mb_data)
+            data_format.iter2dict('tag', self.args.tag, mb_data, check_conflict=False)
         if self.args.title is not None:
             mb_data['title'] = self.args.title