webtrees 1.4 migration

• Check row uniqueness and, if necessary, correct.

SELECT *, COUNT(*)
FROM `wt_media`
GROUP BY `m_media`
HAVING COUNT(*) > 1

• Also, check forums: http://www.webtrees.net/index.php/en/forum/help-for-ver-1-4-0-latest-release/27453-error-after-upgrade#34121
• Make sure that media directory is moved