diff --git a/calibre-plugin/config.py b/calibre-plugin/config.py
index b279138c..c5c20021 100644
--- a/calibre-plugin/config.py
+++ b/calibre-plugin/config.py
@@ -151,7 +151,10 @@ class RejectURLList:
     def _save_list(self,listcache,clearcache=True):
         with busy_cursor():
             #print("_save_list")
-            self.prefs['rejecturls'] = '\n'.join([x.to_line() for x in listcache.values()])
+            ## As of July 2020 it's been > 1.5 years since
+            ## rejects_data added.  Stop keeping older version in
+            ## prefs.
+            del self.prefs['rejecturls']
             self.prefs.save_to_db()
             rejects_data['rejecturls_data'] = [x.to_data() for x in listcache.values()]
             rejects_data.save_to_db()
diff --git a/calibre-plugin/prefs.py b/calibre-plugin/prefs.py
index 4175989b..f15daf13 100644
--- a/calibre-plugin/prefs.py
+++ b/calibre-plugin/prefs.py
@@ -115,7 +115,6 @@ default_prefs = {}
 default_prefs['last_saved_version'] = (0,0,0)
 default_prefs['personal.ini'] = get_resources('plugin-example.ini')
 default_prefs['cal_cols_pass_in'] = False
-default_prefs['rejecturls'] = ''
 default_prefs['rejectreasons'] = '''Sucked
 Boring
 Dup from another site'''