Překlady error

>>> Metropolisův-Hastingsův algoritmus <<<

2 pages read
1 pages written
Execution time: 36 seconds
Read operation time: 18 seconds
Write operation time: 36 seconds
Script terminated by exception:

ERROR: IndexError: Invalid group reference: 2
Groups found: ('Algoritmy',)
Traceback (most recent call last):
  File "/shared/pywikipedia/core/pywikibot/textlib.py", line 404, in replaceExcept
    replacement += match.group(group_id) or ''
IndexError: no such group

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "20170109-preklad.py", line 223, in <module>
    main()
  File "20170109-preklad.py", line 216, in main
    bot.run()  # guess what it does
  File "/shared/pywikipedia/core/pywikibot/bot.py", line 1435, in run
    self.treat(page)
  File "/shared/pywikipedia/core/pywikibot/bot.py", line 1722, in treat
    super(ExistingPageBot, self).treat(page)
  File "/shared/pywikipedia/core/pywikibot/bot.py", line 1786, in treat
    super(NoRedirectPageBot, self).treat(page)
  File "/shared/pywikipedia/core/pywikibot/bot.py", line 1649, in treat
    self.treat_page()
  File "20170109-preklad.py", line 164, in treat_page
    text = textlib.replaceExcept(text, r'(?i)\s*\[\[Kategorie:([^\]]*)\]\]', r'\n\n== Reference ==\n' + preklad + r'\n\n[[Kategorie:\2]]', exceptions, count=1)
  File "/shared/pywikipedia/core/pywikibot/textlib.py", line 408, in replaceExcept
    ''.format(group_id, match.groups()))
IndexError: Invalid group reference: 2
Groups found: ('Algoritmy',)
<class 'IndexError'>
CRITICAL: Closing network session.
urbanecm@tools-bastion-02 /mnt/nfs/labstore-secondary-tools-home/urbanecm/tmp
$