diff --git a/lib/tasks/sync_ntnu_personal_data_tasks.rake b/lib/tasks/sync_ntnu_personal_data_tasks.rake
index 120a983..ded40dd 100644
--- a/lib/tasks/sync_ntnu_personal_data_tasks.rake
+++ b/lib/tasks/sync_ntnu_personal_data_tasks.rake
@@ -32,7 +32,7 @@ module NtnuSyncPlugin
         end
       end
 
-      if !invalid_apa_title.include? apa_title
+      if invalid_apa_title.include? apa_title
         jp.delete
         jp = JournalPaper.new
         jp.paper_title_translations = { 'zh_tw' => apa_title, 'en' => apa_title }
@@ -95,7 +95,7 @@ module NtnuSyncPlugin
         end
       end
 
-      if !invalid_apa_title.include? apa_title
+      if invalid_apa_title.include? apa_title
         wc.delete
         wc = WritingConference.new
         wc.paper_title_translations = { 'zh_tw' => apa_title, 'en' => apa_title }