fix error

app/models/journal_paper.rb

@@ -54,6 +54,8 @@ class JournalPaper
   scope :sort_year_date, ->{ order_by(:year => "desc", :publication_date => "desc", :id=>"desc") }
   scope :sort_for_frontend, ->{ where(:is_hidden=>false).order_by(:year => "desc", :publication_date => "desc", :id=>"desc") }
 
+  alias_method :member_profiles, :member_profile
+
   def create_link
     title = []
 
@@ -211,13 +213,8 @@ class JournalPaper
     plugin_datas
   end
 
-  def member_profile(only_one=true)
-    tmp = super()
-    only_one ? tmp.first : tmp
-  end
-
-  def member_profiles
-    member_profile(false)    
+  def member_profile()
+    member_profiles.first
   end
 
   def member_profile=(mp)