[Mailman] Cron <mailman at prod-01-list-woc> /usr/lib/mailman/cron/disabled

[Cron Daemon]

Traceback (most recent call last):
  File "/usr/lib/mailman/cron/disabled", line 224, in <module>
    main()
  File "/usr/lib/mailman/cron/disabled", line 217, in main
    mlist.Save()
  File "/usr/lib/mailman/Mailman/MailList.py", line 578, in Save
    self.__save(dict)
  File "/usr/lib/mailman/Mailman/MailList.py", line 555, in __save
    os.link(fname, fname_last)
OSError: [Errno 1] Operation not permitted