You can still upgrade to XWiki 14.2 by following the workaround described at https://www.xwiki.org/xwiki/bin/view/ReleaseNotes/Data/XWiki/14.2/
[…] execute the following SQL command on the main wiki DB (and on all subwiki DBs): DROP TABLE xwikilinks;. Then only, start XWiki 14.2.
If you’re not upgrading then you’re fine.