Fixed by using the following script:

// -----------------
import mwdoc
doc = mwdoc.Documentation('slicer.org', '/slicerWiki/')
doc.login('UpdateBot', 'XXXXXXX')

Prepend documentation/versioncheck template. See http://na-mic.org/Mantis/view.php?id=2887 [^]

for version in ['4.0', '4.1', '4.2', 'Nightly']:
pages = doc.listPages('Documentation/%s/Extensions' % version)
for page in pages:
text = page.edit()
if '#REDIRECT' in text and '<noinclude>{{documentation/versioncheck}}</noinclude>\n' in text:
print("[INFO] Page '%s' need update" % page.name)
text = text.replace('<noinclude>{{documentation/versioncheck}}</noinclude>\n', '')
page.save(text, summary='Remove documentation/versioncheck from redirect page. See http://na-mic.org/Mantis/view.php?id=3171')
print "[INFO] Saving page: '%s'" % page.name
// -----------------

Closing resolved issues that have not been updated in more than 3 months